ABC (stream cipher)

Last updated March 05, 2019

In cryptography, ABC is a stream cypher algorithm developed by Vladimir Anashin, Andrey Bogdanov, Ilya Kizhvatov, and Sandeep Kumar.^[1] It has been submitted to the eSTREAM Project of the eCRYPT network.

Cryptography practice and study of techniques for secure communication in the presence of third parties

Cryptography or cryptology is the practice and study of techniques for secure communication in the presence of third parties called adversaries. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages; various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, electrical engineering, communication science, and physics. Applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications.

A stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream (keystream). In a stream cipher, each plaintext digit is encrypted one at a time with the corresponding digit of the keystream, to give a digit of the ciphertext stream. Since encryption of each digit is dependent on the current state of the cipher, it is also known as state cipher. In practice, a digit is typically a bit and the combining operation an exclusive-or (XOR).

In mathematics and computer science, an algorithm is an unambiguous specification of how to solve a class of problems. Algorithms can perform calculation, data processing, and automated reasoning tasks.

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References

↑ Anashin, Vladimir; Bogdanov, Andrey; Andrey, Ilya. "ABC: A New Fast Flexible Stream Cipher" (PDF). European Network of Excellence in Cryptology II . Retrieved 26 January 2015.

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[ABCspec-1] Anashin, Vladimir; Bogdanov, Andrey; Andrey, Ilya. "ABC: A New Fast Flexible Stream Cipher" (PDF). European Network of Excellence in Cryptology II . Retrieved 26 January 2015.