基于子密钥数据的加密算法研究

针对对称密码体制存在的密文保密强度和抗分析破译性较差的缺陷，提出了一种基于子密钥变换产生轮密钥对数据进行分段加密的方法，通过对明文进行变换处理，利用随机产生的独立子密钥，按信息位的判定产生不同的轮密钥，并对每轮分组变换进行加密．阐述了子密钥生成模块、子密钥变换轮密钥进行加解密算法的过程，并对算法性能进行了详细分析．测试数据表明，该算法比同类型的加密算法速度快，而且加密方法的变型性以及轮密钥选取的随机性将增强加密算法的抗攻击性．

Encryption algorithm based on sub-keys

Symmetric Key Cryptography System a serious defect of low quality in confidential strength and a-nalysis resistance. So a block encryption method based on round key produced by sub-key transition is proposed. Transition to the plaintext, produce our round key using randomized independent sub-key, base on the judgment on information bits and encryption transitions in every round. The processes of the production of sub-key mode, the transition from sub-key to round key, the encryption and decryption is illustrated. Testing data shows that this encryption algorithm is faster than conventional ones and its anti-attack ability is reinforced by encryption improvement and randomization.