标准摘要
[中文适用范围]： ISO/IEC 18033 的这一部分指定了分组密码。 分组密码在 k 位密钥的控制下将 n 位块映射到 n 位块。 总共定义了七种不同的分组密码。 它们的分类如表 1 所示。 ISO/IEC 18033 本部分中规定的算法已根据 ISO/IEC 9834 分配了对象标识符。 附件 B 中给出了分配的对象标识符列表。 对对象标识符规范的任何更改导致功能行为改变的算法将导致分配给该算法的对象标识符的改变。 [外文原描述]： ISO/IEC 18033 specifies encryption systems (ciphers) for the purpose of data confidentiality. ISO/IEC 18033-3:2010 specifies block ciphers. A block cipher is a symmetric encipherment system with the property that the encryption algorithm operates on a block of plaintext, i.e. a string of bits of a defined length, to yield a block of ciphertext. ISO/IEC 18033-3:2010 specifies following algorithms: 64-bit block ciphers: TDEA, MISTY1, CAST-128, HIGHT; 128-bit block ciphers: AES, Camellia, SEED. NOTE The primary purpose of encryption (or encipherment) techniques is to protect the confidentiality of stored or transmitted data. An encryption algorithm is applied to data (often called plaintext or cleartext) to yield encrypted data (or ciphertext); this process is known as encryption. The encryption algorithm needs to be designed so that the ciphertext yields no information about the plaintext except, perhaps, its length. Associated with every encryption algorithm is a corresponding decryption algorithm, which transforms ciphertext back into its original plaintext.
英文名称Information technology - Security techniques - Encryption algorithms - Part 3: Block ciphers