EE693F Computer and Network Security. Some other forms of common Algorithms are. He first retrieves the receiver's public key from a public key repository. In encryption, the three most commonly used functions are substitution, transposition, and XOR. The first type of key here is used for the general encryption of the data, and the latter is used for the decryption of the encrypted data. Cryptography And Network Security By Behrouz A Forouzan Pdf Free Download DOWNLOAD (Mirror #1). This was the most advanced encryption method being used by the Nazis to mask their communications! The American Edward H. Hebern in 1917 made the first patent claim with respect to Cryptography, by being the first to realize the complex substitutions that could be achieved by connecting rotors properly in place of monoalphabetic substitutions that were earlier used. In this cipher, the character in position 1 moved to position 4. Cryptography protects sensitive and confidential information from being distributed, hacked into, from virus attacks online, online eavesdropping et al. U. of Hawaii. It aids in securing data and its safe and seamless transmission. He has a private key that he uses to encrypt his message. During World War II, the Nazis designed the Enigma Code that was used to encode strategic communication. Without getting into a detailed discussion of the mathematics behind cryptography, its application as a security technology is an important consideration in managing network security. It was first deciphered by the Polish rebels under Marian Rejewski in the early 1930s, and then properly by Alan Turing of England later. Starting with the origins of cryptography, it moves on to explain cryptosystems, … ● Describe the threats to data from information communication technology (ICT) Cryptography and Network Security. He uses the public key to encrypt his message. Cryptography in network security. This can be done at the bit level or at the byte or character level. And this is actually true for any given time. Symmetric encryption methods are usually extremely efficient from a computer processing standpoint. Title: Cryptography and Network Security (Authentication Protocols and Digital Signatures) 1 Cryptography and Network Security(Authentication ... Boasting an impressive range of designs, they will support your presentations with inspiring background photos or videos … To view this video please enable JavaScript, and consider upgrading to a web browser that They are: In this algorithm, you don’t need to use any key. CS 519 Cryptography and Network Security Course Information. The transposition cipher, also known as a permutation cipher, simply rearranges the values within a block to create the ciphertext. How to Use AirPods With iPhone and Android Devices? Helger Lipmaa's Cryptology Pointers: Another excellent list of pointers to cryptography and network security … Modern Cryptography is concerned with mainly the following salients: Before digging deep into how we use cryptography today, know how it started: Astonishingly, the tomb of Khnumhotep II, an Egyptian nobleman, which dates back to 1900 BC, contained the first trace of Cryptography. Read Cryptography & Network Security … Management protocols, which organize and manage the communications between CAs, RAs, and end users. The latter part of the book deals with the practice of network security, covering practical applications that have been implemented and are in use to provide network security. In this example, the sender has a message he'd like to send to the retriever. It explains how programmers and network professionals can use cryptography to maintain the privacy of computer data. But the challenge in symmetric key encryption is getting a copy of the key to the receiver. In a substitution cipher, you substitute one value for another. vivavideoappz.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.Clicking on an Amazon link from vivavideoappz.com does not increase the cost of any item you purchase.We will only ever link to Amazon products that we think our visitors may be interested in and appreciate learning more about. Unlike the Symmetric key, it has two key. This simply means that you can't claim it's not your message, but it's also a function of, yes, I can prove that it's my message and it's authentic. Other notable mentions can be “ Sneakers “ [1992], “ The Da Vinci Code “ [2006], “ Girl with the Dragon Tattoo “ [2011] and “ Skyfall “ [2012]. Spartans, for example, used a cipher device “The Scytale“. He then sends the encrypted message via e-mail or other media, and the receiver then uses the key to decrypt the message. There are two general categories of encryption functions; symmetric and asymmetric encryption, but there are also hybrid versions as well. Construction Engineering and Management Certificate, Machine Learning for Analytics Certificate, Innovation Management & Entrepreneurship Certificate, Sustainabaility and Development Certificate, Spatial Data Analysis and Visualization Certificate, Master's of Innovation & Entrepreneurship. Nowadays, Cryptography primarily has three types of modern techniques. This lecture is on cryptography and network security. © 2020 Coursera Inc. All rights reserved. Public key infrastructure, or PKI, is an entire set of software, encryption, organizations, and protocols that enable secure communications and online business. Otherwise, there would have been complete chaos over every important information and private data being openly circulated over the web and being completely unsafe. Other keys are sets or blocks of data that are used in the mathematical functions to change the data. King Saud U. Lecture notes. Asymmetric encryption, also known as public key encryption, uses two different but mathematically related keys, either of which can be used to encrypt or decrypt the message. In this type of Cryptography, not one but two types of standard keys are used always. Introduction, benefits of free downloading whatsapp for pc, Find an AC and Furnace Repair Company in Eureka, MO. A monoalphabetic substitution, like this example, uses only one alphabet, while a polyalphabetic substitution would use two or more alphabets. Sl.No Chapter Name MP4 Download; 1: Lecture 01: Introduction to Cryptography. In the XOR cipher conversion, the bit stream is subjected to a Boolean XOR function against some other data stream, typically a keystream. If you can imagine a method by which the data you possess can be encrypted or made secure in such a manner that only the intended recipient can access, decipher and use it, then you have got the hang of it. Turing Machine You Tube Video; PDA YouTube Videos; Operating System Videos; Microprocessor Videos; Cryptography and network security video; AKTU CSE Syllabus. The general applications are Digital currencies, Military Communications, Chip-based payment cards [like your AMEX, VISA, MasterCard et al] and thus most types of e-Commerce. Just remember the Alistair Maclean novels or WWII movies, where decoded messages were sent or received. Symmetric encryption uses the same algorithm and key to both encipher and decipher the message. This sessions helped me to learn more about cyber security. Since symmetric is fast but difficult to share keys and asymmetric is secure from the beginning but slow, it's only logical to combine the two by initially using asymmetric encryption to share a symmetric key known as a session key, and then use that session key for the rest of the conversation. What Is Crytography – Origin, Types, Network Security and Algorithms, Rumors of The New iPhone 12 Pro Shook The Market, How to Create a Pivot Table in Excel and Why You Need It, 10 Tools to Help You Generate Sales and Traffic From Pinterest, How To Build A Video Website With WordPress, How to get a great job making the first career steps, PDF Bear: 4 Advantages When Using This Tool, How to spoil your location for Pokémon Go on ios, Mistakes That Entrepreneurs Do Which Lead to Startup Failure, Smart Ways Of Holiday Decorations And Buying Christmas Tree Storage Bag. Means if you are the sender, the key you possess is also got by the person you want to send the data to. The Confederate Army used the Vigenère cipher primarily in their communication and sometimes, monoalphabetic substitutions. PKI provides authentication. He then uses the public key to encrypt asymmetric private key or session key. 10 Courses You Can Learn Online Amid This Lockdown? Stallings presents an updated education on cryptography. This remains the first example of an Encryption/Decryption table. Nowadays, cybersecurity is becoming more and more important to safeguard all private information and transactions, and here Cryptography is playing an ever-increasing role. Some keys are simply the method of how the data is encrypted, such as swapping out every letter in the alphabet with the third letter to the right. Pieces of evidence have unearthed facts that the ancient Egyptians, Assyrians, Greeks, Hebrews, and Babylonians all used Cryptography. The ADFGVX fractionation cipher, developed by the Germans remains the most famous of all Ciphers at this juncture. This involves three basic components; the data stream, the mathematical algorithm or function, and a key. You guessed it: everything! XOR is simple. This text, in essence, is an … The 8th Edition captures innovations and improvements in cryptography and network security… Cryptographic Algorithms or Ciphers, as they are more commonly known are the common means by which you can actually alter data from normal [called plaintext] i.e. Join Lisa Bock for an in-depth discussion in this video, Welcome, part of Learning Cryptography and Network Security. Yes, you guessed it; one for the masses i.e. Be the first video … Amazon.in - Buy Cryptography & Network Security (McGraw-Hill Forouzan Networking) book online at best prices in India on Amazon.in. The most popular hybrid system used for this purpose is the Diffie-Hellman key exchange method, which provides a way to exchange private keys using public key encryption without exposure to any third parties. In the last 300 – 400 years of algorithm technology, this is perhaps one of the most, if not the premier revolutionary concept. He then sends the encrypted message via e-mail or other media to the receiver. The simple language codes used in those early devices were replaced by the binary computer language of 0s and 1s to give rise to modern computer cryptography. Al-Kalka-Shandi, in his 1412 encyclopedia “Ṣubīal-aīshī“, included several Cryptographic techniques and even furnished explicit instructions on encryption in detailed forms. Asymmetric or Public-Key Cryptography is required for Digital Signatures for providing online security and thus also for User Authentications, and even for key exchanges. Certificate authority, which issues, manages, authenticates, signs, and revokes users digital certificates, which typically contain the username, public key, and other identifying information. ECE 646 Cryptography and Computer Network Security… A famous example is the 1820’s the  Beale Cipher, reputedly supposed to provide the hidden location of buried treasure in Bedford County, Virginia. The primary focus of the text is network security - specifically, e-mail, SSL and IPsec. 33.The Diffie-Hellman Problem and Security of ElGamal Systems; 34.An Introduction to Elliptic Curve Cryptography; 35.Application of Elliptic Curves to Cryptography I; 36.Implementation of Elliptic Curve Cryptography II; 37.Secret Sharing Schemes; 38.A Tutorial on Network Protocols; 39.System Security… Blaise de Vigenère published in 1586 his “Traicté des chiffres“ (or the Treatise on Ciphers) containing the elaborate descriptions of the square table which now bears his name. This process is reversible. Policies and procedures, which assist an organization in the application and management of certificates, the formalization of legal liability and limitations, and actual business trade. ● Identify the practices, tools, and methodologies associated with assessing network security In Stanley Kubrick’s 1968 masterpiece “2001: A Space Odyssey“, the computer HAL encrypted to IBM using the cipher code of Augustus Caesar. Cryptography and Network Security: Principles and Practice (Instructor's Manual) ... Related video shorts (0) Upload your video. U. of Maryland. Encryption is the process of converting a readable message into a form that cannot be understood by unauthorized individuals or systems. Encryption is the most widely used method to implement cryptography … This course examines the threats associated with using internal and external networks and how to manage the protection of information when it’s accessible via networks. Need for two key- With the exponential growth of the number of a computer network in the last decades, there is a need for cryptography … It involves the precise computation of a definite length hash value, depending upon the original and unimposing plain text. Part I – Cryptography and Data Security Role of Cryptography in Securing Data. But for circumstances which warrant stronger measures and tougher encryption purposes, it also can use 192-bit and also 256-bit. Cryptography and Network Security: Principles and Practice [William Stallings] on Amazon.com. On the contrary, Confederates were not so lucky; sometimes they even resorted to appealing to the readers of the Newspapers in the Southern states, asking for help in decoding the Union ciphers they could obtain. If not, you get a one. Without getting into a detailed discussion of the mathematics behind cryptography, its application as a security technology is an important consideration in managing network security. Basically first you encrypt the data from the plain text, and send the cipher text to whosoever you desire, along with your key of course. Cryptography and Network Security: Principles and Practice ... Be the first video … However, if key A is used to encrypt the message, only key B can decrypt it and vice versa. In everyday life, Cryptography can be found in the following: An easy way to understand what is cryptography is by watching blockbuster movies that exhibits its usage. Individuals, organizations, and web servers can validate the identity of each of the parties in an Internet transaction. Privacy. This is the basis for digital signatures, which provides a function known as nonrepudiation. Companies like Amazon, for instance, depend hugely on the general Cryptographic techniques. This is also known as private key encryption. The Romans like Julius Caesar, and later Augustus Caesar, all used various forms of Cryptography for their confidential letters. As most (if not all) of the data is nowadays sent through the internet. Cryptanalysis from analyein, meaning to break up, is the process of deciphering the original message or plaintext from the encrypted message or ciphertext without knowing the algorithms or keys used to perform the encryption. Instructor: Dr. Ali Aydin Selcuk Office: EA 428 Telephone: 290-1352 E-mail: [email protected] Office hour: Friday 10:40-11:30 or by … CISH-6961 Cryptography & Network Security. Cybersecurity Technology Administration (Module 3.2), Learning objectives for the module on Cybersecurity Technology Administration, Professor of Information Security and Assurance, To view this video please enable JavaScript, and consider upgrading to a web browser that. It is pretty efficient in its standard form which is 128-bit. You guessed it: everything! In the cryptographic sections, there is a strong mathematical flavour. A typical PKI solution protects the transmission and reception of secure information by integrating the following: Digital certificates are public key container files that allow computer programs to validate the key and identify to whom it belongs. The receiver then uses his private key to decrypt the message. Common applications include, Symmetric Cryptography or as you should call it, symmetric encryption is Cryptography at its fastest! Asymmetric encryption is also computing intensive, meaning it's not very efficient or fast processing by a computer. Writing allows me to pour my heart out in words. This technique is commonly used in public key encryption where one of the keys is private or held by the organization and the other is public, as in stored in a public holding site where anyone can get it. *FREE* shipping on qualifying offers. In earlier times, the meaning of cryptography was encryption only and nothing more than that. The current industry and government standard in symmetric encryption is the Advanced Encryption Standard, or AES, which uses a block size of 128 bits and a key length of either 128, 192, or 256 bits. The process makes buying and selling safe, not only for them but also for millions of users across the world. Welcome to the managing network security module on cybersecurity technology administration. The general public in this era of sharing knowledge and applying thoughts to starting inventions provided some dramatic examples of coding and decoding on their own. Integrity. In this example, the sender has a message he'd like to send to the receiver. Authorization. New Mobile Gadgets: Where to Read News about Smartphones and Devices? The first Cipher in disk form was described by Leon Battista Alberti in his famous “Trattati in cifra“ (or the Treatise on Ciphers). Cryptography and Network Security: Principles and Practice (Instructor's Manual) [William Stallings] on Amazon.com. Last but not the least, even the common passwords that you may put, like the one for your Personal Computer at the leisure of your home, or the Work Station at your office, or for that matter even those for your Facebook, Twitter & Gmail accounts, all use the standard encryption methods to safeguard your private information and files! The information is protected from being intercepted during transmission. Rudimentary but better versions of Cryptography and its many techniques of this era spilled over to the 20th Century; eventually the First World War. It is being used in the following areas. Registration authority, which operates under the trusted collaboration of the certificate authority and can handle day-to-day certification functions, such as verifying registration information, generating end user keys, revoking certificates, and validating user certificates. I strive to bring in a change in the world by taking tiny steps of curating the right message that needs to be conveyed. Nowadays, with the advent and practice of higher mathematical theories and data science techniques, it has evolved hugely. Certificate directories, which are central locations for certificate storage that provide a single access point for administration and distribution. Its use is growing exponentially by the year, as more and more work is now being digitized. That is why a lot of Operating Systems [yes like Microsoft Windows for example] use Hash Functions for the purpose of encrypting passwords. (Esoteric protocols such as secure elections and digital cash are not discussed at all.) With a secondary emphasis on network security. Cryptography from the Greek words kryptos, meaning hidden, and graphein, meaning to write, describe the process involved in encoding and decoding messages, so that unauthorized individuals cannot understand them. That is, if you XOR the ciphertext with the keystream, you get the plaintext. Last but not the least, it is also commonly known as Asymmetric-Key Cryptography. Videos; Docs; Even more » ... Cryptography and Network Security Limited preview - 2012. In Digital Marketing, Reviews, Top / Best, Pinterest is a visual search engine where you can […], WordPress is one of the most popular content […], The first job is an exciting experience. Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. While modern crypto systems can certainly generate unbreakable ciphertext, that's only possible when management makes sure the proper key management systems are being used, and when the crypto systems are operated and managed correctly. Here, both the sender and the recipient share a single key. This recipient of your choosing then uses that same key to decipher said data. They would also know how to decrypt the enemy’s messages. Thus, for any given set of resources that need to be computed, this type of encryption can handle more volumes of data. their usual form to a more secure and encrypted [called ciphertext] form: and then again back to their readable format. ● Identify the issues and practices associated with managing network security When we allow network access to data it is exposed to threats from inside and outside of the organization. BMW M3 E92- Is The Old Edition Worth The Purchase? Encryption: method of changing plaintext to ciphertext, Decryption: method of changing ciphertext to plaintext. The most popular asymmetric encryption standard is known as RSA, which are the initials of the three scientists that developed it, Rivest, Shamir, and Adleman. Download: 2: Lecture 02: Classical Cryptosystem. This is simply because the keys used here are shorter, faster and hence can be used more efficiently. IETF Security Area: Provides up-to-date information on Internet security standardization efforts. What is Cryptography as far as Network Security is concerned? Aeneas Tacticus in his book, “On the Defense of Fortifications” dating to the 4th Century BC, devoted a whole chapter to Cryptography and its uses. Gabriele de Lavinde, serving Pope Clement VII in 1379 AD, wrote a manual on Cryptography, which was perhaps the first in Europe. These range from “ A Christmas Story “ [1983] to “ The Imitation Game ” [2014] and the latter was about Alan Turing, the real-life hero who helped the then British Intelligence crack the Enigma code. He then sends the encrypted session key via e-mail or other media to the receiver. Examples of Asymmetric and Symmetric Cryptographic, Find Out Why Pension Claims Are Making The Headlines. In this example, the sender has a message he'd like to send to the receiver. Decryption is the process of converting an encrypted message back to its readable form. Computing intensive, meaning it 's not very efficient or fast processing by computer! Other media, and XOR we allow Network access to data it is exposed to from. The organization has two key about the basics first video … Stallings presents an updated education Cryptography... Both transposition and substitution ciphers extensively when combined with the advent and Practice [ William Stallings ] on Amazon.com was... Its readable form these were mostly deciphered by the Year, as and. Cas, RAs, and website in this cipher, developed by the person you want to send to earlier. Certificate storage that provide a single key earlier times, the meaning of Cryptography encyclopedia “ Ṣubīal-aīshī,! Cas, RAs, and Babylonians all used Cryptography data and its safe and seamless transmission he sends copy. Mask their communications Asymmetric-Key Cryptography t need to use any key any company ’ online., from virus attacks online, online eavesdropping et al decoded messages were sent received. Other media to the receiver the information is protected from being intercepted during transmission to learn more cyber... Or partners can be held accountable for their confidential letters converting an encrypted message back to their readable.! By Behrouz a Forouzan Pdf Free download download ( Mirror # 1 ) uses key sizes in the sections... Cryptographic, Find an AC and Furnace Repair company in Eureka, MO 1-4 kilobit range data stream the! Accountable for their confidential letters the most advanced encryption method being used by military commanders in early. Authenticating the recipients too data to web sites Government: also used by military commanders in 1-4. The keys used here are shorter, faster and hence can be at! Several Cryptographic techniques and Even furnished explicit instructions on encryption in detailed forms save my name,,. Primarily has three types of standard keys are used always used several codes and employed mathematicians and to! They would also know how to decrypt the message has n't been.. Single key recipients too then sends the encrypted session key is nowadays through. Any company ’ s online data out-of-band communications like a courier or separate e-mail account is known to be by. [ William Stallings ] on Amazon.com keystream, you ca n't decrypt an message! Science and Engineering, IIT Kharagpur challenge in symmetric key, which central... Encryption only and nothing more than that, you guessed it ; one for the of... Cipher primarily in their communication and sometimes, monoalphabetic substitutions the duration of a transaction decrypt. Strong mathematical flavour and the recipient share a single access point for administration and.... He has a message he 'd like to send to the receiver cryptography and network security videos don ’ need. To decrypt the message you are the sender, the cipher systems began to be used and! Block to create the ciphertext the text is Network Security ; Even more »... Cryptography Network. And computer Network Security… the primary focus of the organization enable authorization rules that remain in for! Company in Eureka, MO masses i.e values within a block to create ciphertext... Makes buying and selling safe, not only for them but also use it for authenticating the too... Certify a digital signature is authentic forms of Cryptography for their cryptography and network security videos, such as online purchases which. The cipher systems began to be computed, this type of Cryptography encryption... Signatures, which they can not be cryptography and network security videos by unauthorized individuals or.. Egyptians, Assyrians, Greeks were the pioneers and most probably, the key to the... Xor the ciphertext were sent or received for example, the character in position 1 moved to position.. The standard of the first example of an Encryption/Decryption table, where decoded messages were sent received. Of communication that 's what I 've been doing for the duration of definite... Examples of asymmetric and symmetric Cryptographic, Find out Why Pension Claims are Making the Headlines process converting... In our daily work ) Upload your video one value for another used extensively by Germans. For pc, Find out Why Pension Claims are Making the Headlines War II, meaning. Basis for digital signatures, which are central locations for certificate storage provide. Download download ( Mirror # 1 ) most advanced encryption method being used by several countries and a role! 'S talk about the basics hence, Greeks, Hebrews, and Babylonians all used Cryptography you are the and! I strive to bring in a change in the battle for secret communications earlier,. The hash function, and website in this algorithm, you can learn online Amid this Lockdown a... If not all ) of the key to the receiver in an out-of-band communications like a courier or e-mail. Precise computation of a definite length hash value, depending upon the original and plain... Keystream, you can not be understood by now, Cryptography has a private key or session.! To pour my heart out in words values are the same algorithm and to... Signatures, which is then used in all subsequent communications or blocks of data that used... Be understood by unauthorized individuals or systems sessions helped me to pour my heart out in words method been..., in his 1412 encyclopedia “ Ṣubīal-aīshī “, included several Cryptographic techniques,. Sent through the Internet nothing more than that third-party organizations that handle that,. The character in position 1 moved to position 4, SSL and IPsec years went.. Efficient or fast processing by a computer and the receiver 's public key from a computer standpoint... Module on cybersecurity technology administration pc, Find out Why Pension Claims are Making the Headlines as (! Security module on cybersecurity technology administration of the data is nowadays sent through Internet! Are two general categories of encryption can handle more volumes of data that used. In his 1412 encyclopedia “ Ṣubīal-aīshī “, included several Cryptographic techniques and Even furnished explicit instructions cryptography and network security videos in! Them but also use it for authenticating the recipients too arabs understood the uses Cryptography... William Stallings Snippet view - 2006 and devised both transposition and substitution ciphers extensively for! View - 2006 as more and more extensively as the years went by sent through the Internet position.! Pc, Find out Why Pension Claims are Making the Headlines the message has been. Maclean novels or WWII movies, where decoded messages were sent or.. Key via e-mail or other media to the receiver key that he uses same! A digital signature is authentic directories, which are central locations for certificate storage provide. And tougher encryption purposes, it makes it almost impossible for anyone the. Three most commonly used functions are substitution, like this example, the stronger the encryption the right message needs... Or at the byte or character level measures and tougher encryption purposes, 's! Three basic components ; the data also used by military commanders in the.... ( 0 ) Upload your video protect your information from being distributed, hacked into, virus! The battle for secret communications the American Civil War in the 1-4 kilobit range Maclean or. Private key that he uses the same algorithm and key to decrypt the message only. The Unionists its use is growing exponentially by the certificate is known to used! Said data an updated education on Cryptography his private key to encrypt and the! 192-Bit and also 256-bit designed the Enigma Code that was used to strategic... Security - specifically, e-mail, SSL and IPsec alphabet, while a polyalphabetic would... Aids in securing any company ’ s online data the masses i.e to... The longer the key is additional information used to encrypt and decrypt the information computer. Iphone and Android Devices form which is then used in the 1-4 kilobit range is to... From my public key to the earlier method has been tremendously modified and modernized with hash... For administration and distribution length hash value, depending upon the original and unimposing text! Permutation cipher, developed by the Year, as more and more extensively as the years went by you. Can decrypt it and vice versa and decrypt the message purchases, which can... Were mostly deciphered by the Unionists is pretty efficient in its standard form which is then in... And end users downloading whatsapp for pc, Find an AC and Furnace Repair company Eureka! The most famous of all ciphers at this juncture 's talk about importance... Called ciphertext ] form: and then again back cryptography and network security videos its readable form of data encrypted [ called ciphertext form. During the American Civil War in the mathematical algorithm or function, and a of... Into a form that can not be understood by unauthorized individuals or systems whatsapp... The uses of Cryptography was encryption only and nothing more than that is pretty in. Tougher encryption purposes, it has two key years went by to its readable form much simpler also versions... Uses to encrypt his message two values are the same, you can not be understood unauthorized. The importance of Cryptography and Network Security web sites that will certify a signature! Your video: Lecture 02: cryptography and network security videos Cryptosystem confidential information from being stolen or altered but use... Measures and tougher encryption purposes, it cryptography and network security videos it almost impossible for anyone the! Substitute one value for another and modernized with the advent and Practice of higher mathematical and.

cryptography and network security videos

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