Plaintext Attack

Definitions

1. An attack that leverages knowledge of plaintext, chosen plaintext, or predictable message structure to analyze or break a cryptographic system. Plaintext attacks are a major reason modern cryptography depends on strong modes, randomness, and careful protocol design rather than on secrecy of message formats.

   In plain English: An attack that uses known or chosen unencrypted data to help break encryption.

   Example: "The legacy stream cipher was vulnerable to a plaintext attack because the protocol headers were highly predictable."

Related Terms

• Certificate
• HTTPS
• SSL
• Public Key Cryptography
• Bitlocker
• Block Cipher
• Ciphertext
• Disk Encryption
• Acoustic Cryptanalysis
• Confusion