TAILIEUCHUNG - Chapter 7: Advanced Encryption Standard (AES)

Objectives of Chapter 7: To review a short history of AES; to define the basic structure of AES; to define the transformations used by AES; to define the key expansion process; to discuss different implementations. | Cryptography and Network Security Chapter 7 Advanced Encryption Standard AES Chapter 7 Objectives To review a short history of AES To define the basic structure of AES To define the transformations used by AES To define the key expansion process To discuss different implementations 7-1 INTRODUCTION History. The Advanced Encryption Standard AES is a symmetric-key block cipher published by the National Institute of Standards and Technology NIST in December 2001. Topics discussed in this section History Criteria Rounds Data Units Structure of Each Round In February 2001 NIST announced that a draft of the Federal Information Processing Standard FIPS was available for public review and comment. Finally AES was published as FIPS 197 in the Federal Register in December 2001. Criteria Rounds. The criteria defined by NIST for selecting AES fall into three areas 1. Security 2. Cost 3. Implementation. AES is a non-Feistel cipher that encrypts and decrypts a data block of 128 bits. It uses 10 12 or 14 rounds. The key size which can be 128 192 or 256 bits depends on the number of rounds. Note AES has defined three versions with 10 12 and 14 rounds. Each version uses a different cipher key size 128 192 or 256 but the round keys are alWays 128 bits. 1 Continue Figure General design of AES encryption cipher Data Units. Figure Data units used in AES Continue Continue I Example 7F Continue Figure Block-to-state and state-to-block transformation Figure Changing plaintext to state Text Hexadecimal E s u s E s A M A T R I X z y- I 00 04 12 14 12 04 12 00 oc 00 13 11 08 23 19 19 00 12 oc 08 04 04 00 23 12 12 13 19 14 00 11 19 State 7-2 TRANSFORMATIONS Structure of Each Round Figure Structure of each round at the encryption site To provide security AES uses four types of transformations substitution permutation mixing and key-adding. Topics discussed in this section Substitution .

• An ninh - Bảo mật
• Encryption Standard
• Basic structure of AES
• Analyze DES
• Transposition ciphers
• An toàn thông tin
• Bảo mật thông tin
• Advanced encryption standard (AES)
• Announcing the Advanced encryption standard (AES)
• Specification for the Advanced encryption standard
• Advanced encryption standard Mathematical preliminaries
• Advanced encryption standard Algorithm specification
• Advanced encryption standard Implementation issues
• Bảo mật hệ thống thông tin
• Bài giảng Bảo mật hệ thống thông tin
• Data Encryption Standard
• Advanced Encryption Standard
• Quy trình mã hóa theo khối
• Mã hóa tích
• An toàn và bảo mật thông tin
• Data security
• Lecture Data security and encryption
• Mã hóa dữ liệu
• Bảo mật dữ liệu
• Classical cipher techniques
• security
• federal information processing standard
• implementation
• aes encryption cipher
• original design
• Block ciphers
• The data encryption standard
• Number theory
• Secure hash standard
• Processing Standards Publication
• Digital Signature Standard
• Federal Information Resources
• Data security and encryption
• Network security
• Symmetric ciphers
• Asymmetric ciphers
• Cryptographic data integrity algorithms
• Mutual trust
• International Journal of Computer Networks and Communications Security
• Symmetric key encryption
• AES GCM and external key derivation for smart phones
• The encrypted information
• Counter output
• AES encryption core
• Silicon demonstration
• IoT systems
• S box optimization
• Advanced Encryption
• Computer Security Standard
• Secretary of Commerce
• Other FIPS approved
• Information Processing
• Technical Information
• cao đẳng công kỹ nghệ Đông Á
• giải thuật advanced encryption standard
• mã hóa các văn bản
• luận văn
• kỹ thuật điện
• luận văn thạc sỹ
• Basic structure of DES
• Khoa học máy tính
• Tạp chí khoa học
• Coarse grained Reconfigurable Architecture
• Reconfigurable Computing
• Parallel Processing
• International Journal of Computer Science & Communication Networks
• Design of a hybrid cryptographic algorithm
• Hybrid cryptographic algorithm
• New hybrid cryptographic algorithm
• Orthogonal Frequency Division Multiplexing
• Quadrature Amplitude Modulation
• Authentication Key
• Cellular Network
• Lecture On safety and security of information systems
• On safety and security of information systems
• High throughput
• Multi core
• Real time applications
• A multi core AES encryption
• Lecture notes on Computer and network security
• Computer security
• Encryption key
• Overall structure of AES
• Bài giảng Mật mã học
• Mật mã học
• Mã hóa DES
• Đata encryption standard
• Encryption of DES
• ES block cipher
• Descryption of DES