# Aes encryption cipher

Xem 1-11 trên 11 kết quả Aes encryption cipher
• ### File Advanced Encryption Standard (AES)

AES 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. The criteria defined by NIST for selecting AES fall into three areas: 1. Security 2. Cost 3. Implementation.

• ### 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.

• ### Lecture Data security and encryption - Chapter 9: Public-key cryptography and RSA

This chapter presents the following content: The AES selection process; The details of Rijndael – the AES cipher; looked at the steps in each round; out of four AES stages, two are discussed; substitute bytes; shift rows.

• ### Lecture Data security and encryption - Chapter 6: Block ciphers and the data encryption standard

The objective of this chapter is to illustrate the principles of modern symmetric ciphers. For this purpose, we focus on the most widely used symmetric cipher: the Data Encryption Standard (DES). Although numerous symmetric ciphers have been developed since the introduction of DES, and although it is destined to be replaced by the Advanced Encryption Standard (AES), DES remains the most important such algorithm.

• ### Lecture Data security and encryption - Chapter 8: Data encryption standard (DES)

This chapter presents the following content: Data encryption standard (DES), strengths of DES, differential & linear cryptanalysis, block cipher design principles, the AES selection process, the details of Rijndael – the AES cipher, looked at the steps in each round.

• ### Lecture Data security and encryption - Chapter 10: Other public-key cryptosystems

This chapter presents the following content: Number theory, divisibility & GCD, modular arithmetic with integers, Euclid’s algorithm for GCD & inverse, the AES selection process, the details of Rijndael – the AES cipher, looked at the steps in each round out of four AES stages, last two are discussed: MixColumns, AddRoundKey.

• ### Lecture Data security and encryption - Chapter 11: Basic concepts in number theory and finite fields

This chapter presents the following content: Number theory, divisibility & GCD, modular arithmetic with integers, Euclid’s algorithm for GCD & inverse, the AES selection process, the details of Rijndael – the AES cipher, looked at the steps in each round out of four AES stages.

• ### Performance of orthogonal frequency division multiplexing based advanced encryption standard

In this work, one of the methods deploying encryption to cipher data is represented. The primary object of this project is applying Advanced Encryption Standard (AES) in communications based Orthogonal Frequency Division Multiplexing (OFDM). This article discusses the security of the method encrypting directly QAM symbols instead of input bit-stream.

• ### From AES to dynamic AES

The cryptographic algorithm AES (Advanced Encryption Standard) works with the transformations SubBytes, ShiftRows, MixColumns and AddRoundKey, all of them fixed and selected a priori. In this paper, we will show dynamic variants of AES, where the new transformations are RandomSubBytes, RandomShiftRows, RandomMixColumns and RandomAffineTransfKey.

• ### Internet Security Cryptographic Principles, Algorithms and Protocols - Chapter 3

Symmetric Block Ciphers Chương này sẽ đề cập với một số thuật toán mật mã khối quan trọng đã được phát triển trong quá khứ. Họ là IDEA (1992), RC5 (1995), rc6 (1996), DES (1977) và AES (2001). Advanced Encryption Standard (AES) xác định một thuật toán mã hóa FIPS-phê duyệt khối đối xứng sẽ sớm đến để được sử dụng thay cho Triple DES hoặc rc6.

• ### Public-Key Cryptography

Advanced Encryption Standard competition began in 1997 Rijndael was selected to be the new AES in 2001 AES basic structures: block cipher, but not Feistel cipher encryption and decryption are similar, but not symmetrical basic unit: byte, not bit block size: 16-bytes (128 bits) three different key lengths: 128, 192, 256 bits AES-128, AES-192, AES-256 each 16-byte block is represented as a 4 x 4 square matrix, called the state matrix the number of rounds depends on key lengths 4 simple operations on the state matrix every round (except the last round) ...