对加密信息的攻击类型 ●唯密文攻击 only know algorithm and ciphertext, is statistical, know or can identify plaintext 已知明文攻击 know/suspect plaintext and ciphertext ●选择明文攻击 select plaintext and obtain ciphertext ●选择密文攻击 select ciphertext and obtain plaintext ●选择文本攻击 select plaintext or ciphertext to en/decrypt wit 2021/1/27 Cryptography and Network Security-2 22/812021/1/27 Cryptography and Network Security - 2 22/81 对加密信息的攻击类型 ⚫ 唯密文攻击 ⚫ only know algorithm and ciphertext, is statistical, know or can identify plaintext ⚫ 已知明文攻击 ⚫ know/suspect plaintext and ciphertext ⚫ 选择明文攻击 ⚫ select plaintext and obtain ciphertext ⚫ 选择密文攻击 ⚫ select ciphertext and obtain plaintext ⚫ 选择文本攻击 ⚫ select plaintext or ciphertext to en/decrypt