基于SM4和ECC的混合加密算法研究

STUDY ON SM4 AND ECC-BASED HYBRID ENCRYPTION ALGORITHM

由于单一加密算法不足以满足无线嵌入式通信系统对信息安全的要求,提出基于提升的SM4算法和公钥加密算法的椭圆曲线密码体制(ECC)混合加密。首先将SM4中的参数FK由固定值改为动态选择生成,然后用提升的SM4算法加密信息,并采用ECC完成SM4的密钥管理。最后基于Visual C++6.0验证了混合加密算法的可行性。实验结果表明,提升的算法以占用时间资源为代价提高了算法的扩散性。该算法能够有效地提高加密的安全性,适用于对嵌入式系统中数据加密。

Since the single encryption algorithm does not sufficiently meet the requirements of wireless embedded communication system on information security,we proposed a hybrid encryption of elliptic curve cryptosystem( ECC),which is based on the enhanced SM4 and the public key encryption algorithm. It first changes the parameter FK of SM4 from the fixed value to the dynamically selected generation,and then encrypts the information with enhanced SM4,and uses ECC to complete the key management of SM4. Finally we verified the feasibility of the hybrid encryption algorithm based on Visual C + + 6. 0. Experimental results showed that the enhanced algorithm improves its diffusibility at the cost of time resources occupancy. This algorithm can effectively improve the security of encryption,and is suitable for data encryption in embedded system.