Encryption Wikipedia

The rapid developments in communication systems have resultedin a need to perform encryption on data in real-time. Encryption ofdigital information in real-time holds the key to the successfulgrowth of major applications in areas such as satellite communicationsand electronic commerce. Cryptography is typically a mathematicallyintensive process which, to date, has mainly been implemented insoftware. However, such methods are slow and cannot cope with thedemands of rapidly growing broadband communication systems. Therefore, innovative hardware solutions involving mapping of complexmathematical operations onto special purpose silicon circuitarchitectures provide the only feasible solution.In "System-on-Chip Architectures and Implementations forPrivate-Key" "Data Encryption," new generic siliconarchitectures for the DES and Rijndael symmetric key encryptionalgorithms are presented. The generic architectures can be utilised torapidly and effortlessly generate system-on-chip cores, which supportnumerous application requirements, most importantly, different modesof operation and encryption and decryption capabilities. In addition, efficient silicon SHA-1, SHA-2 and HMAC hash algorithm architecturesare described. A single-chip Internet Protocol Security (IPSec)architecture is also presented that comprises a generic Rijndaeldesign and a highly efficient HMAC-SHA-1 implementation.In the opinion of the authors, highly efficient hardwareimplementations of cryptographic algorithms are provided in this book.However, these are not hard-fast solutions. The aim of the book is toprovide an excellent guide to the design and development processinvolved in the translation from encryption algorithm tosilicon chipimplementation.

Deterministic encryption - A deterministic encryption scheme (as opposed to a probabilistic encryption scheme) is a cryptosystem which always produces the same ciphertext for a given plaintext and key, even over separate executions of the encryption algorithm. Examples of deterministic encryption algorithms include the RSA cryptosystem (without encryption padding), and many block ciphers when used in ECB mode or with a constant initialization vector.

Probabilistic encryption - Probabilistic encryption is the use of randomness in an encryption algorithm, so that when encrypting the same message several times it will, in general, yield different ciphertexts. The term "probabilistic encryption" is typically used in reference to public key encryption algorithms, however various symmetric key encryption algorithms achieve a similar property (e.

Advanced Encryption Standard - In cryptography, the Advanced Encryption Standard (AES), also known as Rijndael, is a block cipher adopted as an encryption standard by the US government. It is expected to be used worldwide and analysed extensively, as was the case with its predecessor, the Data Encryption Standard (DES).

Optimal Asymmetric Encryption Padding - In cryptography, Optimal Asymmetric Encryption Padding (OAEP) is a padding scheme often used together with RSA encryption. The OAEP algorithm is a form of feistel network which uses a pair of random oracles G and H to process the plaintext prior to asymmetric encryption.

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