基于多变量公钥密码构建热钱包安全保护方案

Construction of hot wallet security protection scheme based on multivariable public key cryptography

区块链应用于金融系统具有一定的可行性,但在实际应用中,仍出现一些安全性问题。文中介绍了当前区块链交易中遭受的攻击威胁,基于应对抗量子计算攻击、解决区块链热钱包私钥易被暴力破解的问题,提出了一种基于多变量公钥加密技术,并应用于区块链热钱包交易过程。通过构建私有链,分析对比多变量公钥密码加密后密文与SM2椭圆曲线数字加密后密文的结果、耗时,得出多变量公钥加密算法可以通过改变多变量公钥密码中G的仿射函数,增加公私钥、签名长度,证实了文中方案的可实现性。

The application of blockchain in financial system is feasible,but there are still some security problems in practical application.This paper introduces the attack threat suffered in the current blockchain transaction.Based on resisting the quantum computing attack and solving the problem that the private key of blockchain hot wallet is easy to be brutally cracked,a multivariable public key encryption technology is proposed and applied to the blockchain hot wallet transaction process.By constructing the private chain,analyzing and comparing the results and time⁃consuming of the ciphertext encrypted by multivariable public key cryptography and the ciphertext encrypted by SM2 elliptic curve digital encryption,it is concluded that the multivariable public key encryption algorithm can increase the length of public⁃private key and signature by changing the affine function of G in multivariable public key cryptography,which proves the feasibility of this scheme.