{ return "SHACAL2"; } std::unique_ptr<BlockCipher> new_object() const override { return std::make_unique<SHACAL2>(); } size_t parallelism() const override; bool has_keying_material() const override; private: void key_schedule(std::span<const uint8_t> key) override; #if defined(...
J. Shepherd, "Stream or block cipher for securing VoIP?," International Jour- nal of Network Security, vol. 5, no. 2, pp. 128-133, 2007.Ashraf D Elbayoumy and Simon J Shepherd, "Stream or Block Cipher for Securing VoIP?," International Journal of Network Security, vol. 5, no. 2,...
在以前的教程中,我们已经介绍了PRNG(伪随机数生成器)、流/序列密码器。 我们了解了它们是如何基于PRF(伪随机函数)和OWF(单向函数)工作的。 现在,我们将进一步探讨块/分组密码,它们是如何在PRF的基础上,配合一些Shuffle(洗牌)算法来模拟PRP(伪随机置换)的行为。 1. 伪随机函数 (PRF) PRF是一个函数,它为给定的...
It should be noted that both the stream ciphers and the block ciphers are a type of symmetric-key cryptography technique. The main difference between the two is that in Stream cipher, the plain text is taken letter by letter and is encrypted into the corresponding ciphertext (example: Caeser...
(Data Encryption Standard) to illustrate block cipher design principles *3.0 simplified DES – S-DES Input : 8 bits plaintext Key: 10 bits Output:8 bits ciphertext Encryption Algorithm: 5 functions Initial Permutation: IP complex function: fk simple permutation function: SW complex function: fk ...
Within this document, a novel system for image cryptography design utilizing fixed-point stream cipher chaotic maps is proposed. The system consists of fix... AA Salih,ZA Abdulrazaq,HG Ayoub - 《Baghdad Science Journal》 被引量: 0发表: 2024年 New Discrete Chaotic Cipher Key Generation forDigit...
Encryption technique using stream cipher and block 优质文献 相似文献 参考文献 引证文献A New Ultrafast Stream Cipher Design: COS Ciphers high speed encryptionBoolean functionsblock cipherThis paper presents a new stream cipher family whose output bits are produced by blocks. We particularly ... E Fil...
By using a transformation specified by a symmetric key, a block cipher is able to encrypt bulk data, and is one of the basic components of many cryptographic protocols in use today. A stream cipher, on the other hand, takes plaintext characters or digits and combines them with a pseudo ...
In this paper, we propose a new stream cipher construction based on block cipher design principles. The main idea is to replace the building blocks used in block ciphers by equivalent stream cipher components. In order to illustrate this approach, we construct a very simple synchronous stream cip...
The system disclosed comprises a dual function cryptographic system capable of operating in either a stream or block cipher mode. Further, with minimal alteration the system is capable of performing e