Known-plaintext attack: A known-plaintext attack is a method of cryptanalysis where the attacker has access to both the plaintext (unencrypted message) and its corresponding ciphertext (encrypted message). It is used to exploit weaknesses in encryption algorithms by analyzing how the plaintext is transformed into ciphertext, with the aim of discovering the encryption key. Examples include attacks on historical ciphers like the Vigenère cipher.
Categories: CC D5: Security Operations | CCSP D2: Cloud Data Security | CISM D3: Information Security Program | CISSP D3: Security Architecture and Engineering | Security+ D1: General Security Concepts | SSCP D5: Cryptography
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