密码芯片中抗差分功耗分析攻击的DES方案设计

功耗分析攻击是当前密码芯片中各类数据加密算法的主要安全威胁，尤其是对于迄今应用最为广泛的数据加密标准算法造成了严重的危害。通过分析数据加密标准算法遭受功耗分析攻击的原理，并结合针对数据加密标准算法关键防御技术，给出了一种基于互补电路的中间值掩码DES方案设计。主要是利用双电路进行互补输出，以保证寄存器翻转保持功耗恒定，从而最大限度地降低功耗差异。根据算法性能分析结果表明：该方案可以抵抗差分功耗分析攻击，且实现简单，能够直接应用于密码芯片的电路设计中。

Scheme design of resisting differential power analysis attack for DES in cryptographic chip

Currently, power analysis attacks are the major security threats to the cryptographic chips with different kinds of data encryption algorithm. Especially, data encryption standard algorithm which is the most widely used in different systems by far has suffered serious harm because of power analysis attacks. According to the principle and the resistance countermeasures of power analysis attacks aiming to data encryption standard algorithm, a scheme design of middle value masking for data encryption standard algorithm based on complementary circuit is proposed. The scheme mainly carry out the complementary output by using the double ciruit in order to ensure keeping the power consumption constant of register in roll-in-over and to decrease the difference of power consumption farthest. Performance analysis results demonstrate that the scheme can resist differential power analysis attacks and easy to be implemented, and can be applied in the circuit design of cryptographic chips directly.