ciphertext+only+attack

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• Ciphertext-only attack — In cryptography, a ciphertext only attack (COA) or known ciphertext attack is an attack model for cryptanalysis where the attacker is assumed to have access only to a set of ciphertexts. The attack is completely successful if the corresponding… …   Wikipedia

• Attack model — Attack models or attack typesref|secondname specify how much information a cryptanalyst has access to when cracking an encrypted message. Some common attack models are: *Ciphertext only attack *Known plaintext attack *Chosen plaintext attack… …   Wikipedia

• 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

• 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

• 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

• Known-plaintext attack — The known plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has samples of both the plaintext (called a crib), and its encrypted version (ciphertext). These can be used to reveal further secret information such as… …   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

• Ciphertext stealing — In cryptography, ciphertext stealing (CTS) is a general method of using a block cipher mode of operation that allows for processing of messages that are not evenly divisible into blocks without resulting in any expansion of the ciphertext, at the …   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

• Chosen-plaintext attack — Die Kryptoanalyse (in neueren Publikationen auch: Kryptanalyse) bezeichnet im ursprünglichen Sinne das Studium von Methoden und Techniken, um Informationen aus verschlüsselten Texten zu gewinnen. Diese Informationen können sowohl der verwendete… …   Deutsch Wikipedia

• Adaptive Chosen Ciphertext — Die Kryptoanalyse (in neueren Publikationen auch: Kryptanalyse) bezeichnet im ursprünglichen Sinne das Studium von Methoden und Techniken, um Informationen aus verschlüsselten Texten zu gewinnen. Diese Informationen können sowohl der verwendete… …   Deutsch Wikipedia