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6 relations: Adaptive chosen-ciphertext attack, Clifford Cocks, ID-based encryption, Quadratic residue, Quadratic residuosity problem, Random oracle.
Adaptive chosen-ciphertext attack
An adaptive chosen-ciphertext attack (abbreviated as CCA2) is an interactive form of chosen-ciphertext attack in which an attacker sends a number of ciphertexts to be decrypted, then uses the results of these decryptions to select subsequent ciphertexts.
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Clifford Cocks
Clifford Christopher Cocks CB FRS (born 28 December 1950) is a British mathematician and cryptographer.
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ID-based encryption
ID-based encryption, or identity-based encryption (IBE), is an important primitive of ID-based cryptography.
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Quadratic residue
In number theory, an integer q is called a quadratic residue modulo n if it is congruent to a perfect square modulo n; i.e., if there exists an integer x such that: Otherwise, q is called a quadratic nonresidue modulo n. Originally an abstract mathematical concept from the branch of number theory known as modular arithmetic, quadratic residues are now used in applications ranging from acoustical engineering to cryptography and the factoring of large numbers.
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Quadratic residuosity problem
The quadratic residuosity problem in computational number theory is to decide, given integers a and N, whether a is a quadratic residue modulo N or not.
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Random oracle
In cryptography, a random oracle is an oracle (a theoretical black box) that responds to every unique query with a (truly) random response chosen uniformly from its output domain.
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