在线词典

In cryptography, an initialization vector (IV) or starting variable (SV)ISO/IEC 10116:2006 Information technology — Security techniques — Modes of operation for an n-bit block cipher is a fixed-size input to a cryptographic primitive that is typically required to be random or pseudorandom. Randomization is crucial for encryption schemes to achieve semantic security, a property whereby repeated usage of the scheme under the same key does not allow an attacker to infer relationships between segments of the encrypted message.