ciphertext-only attack secure

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• Ciphertext — The Zimmermann Telegram (as it was sent from Washington to Mexico) encrypted as ciphertext. This article is about encrypted information. For an overview of cryptographic technology in general, see Cryptography. In cryptography, ciphertext (or… …   Wikipedia

• Ciphertext indistinguishability — is a property of many encryption schemes. Intuitively, if a cryptosystem possesses the property of indistinguishability, then an adversary will be unable to distinguish pairs of ciphertexts based on the message they encrypt. The property of… …   Wikipedia

• Chosen-ciphertext attack — A chosen ciphertext attack (CCA) is an attack model for cryptanalysis in which the cryptanalyst gathers information, at least in part, by choosing a ciphertext and obtaining its decryption under an unknown key. In the attack, an adversary has a… …   Wikipedia

• Brute force attack — In cryptanalysis, a brute force attack is a method of defeating a cryptographic scheme by trying a large number of possibilities; for example, possible keys in order to decrypt a message. In most schemes, the theoretical possibility of a brute… …   Wikipedia

• Chosen-plaintext attack — A chosen plaintext attack (CPA) is an attack model for cryptanalysis which presumes that the attacker has the capability to choose arbitrary plaintexts to be encrypted and obtain the corresponding ciphertexts. The goal of the attack is to gain… …   Wikipedia

• 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… …   Wikipedia

• Coppersmith's Attack — describes a class of attacks on the public key cryptosystem RSA based on Coppersmith s theorem (see below). The public key in the RSA system is a tuple of integers (N,e), where N is the product of two primes p and q. The secret key is given by an …   Wikipedia

• Timing attack — In cryptography, a timing attack is a side channel attack in which the attacker attempts to compromise a cryptosystem by analyzing the time taken to execute cryptographic algorithms. The attack exploits the fact that every operation in a computer …   Wikipedia

• Stream cipher attack — Stream ciphers, where plaintext bits are combined with a cipher bit stream by an exclusive or operation (xor), can be very secure if used properly. However they are vulnerable to attack if certain precautions are not followed:*keys must never be… …   Wikipedia

• защищенный от атаки на основе знания одного только шифртекста — — [http://www.rfcmd.ru/glossword/1.8/index.php?a=index d=23] Тематики защита информации EN ciphertext only attack secure …   Справочник технического переводчика

• Cryptography — Secret code redirects here. For the Aya Kamiki album, see Secret Code. Symmetric key cryptography, where the same key is used both for encryption and decryption …   Wikipedia