一种基于随机二态编码的交易保密验证方法

Transaction confidentiality verification method based on random two-state encoding

针对密文状态下的交易金额验证问题,采用安全多方计算原理提出一种新的随机二态编码方法。应用这种编码方法和随机产生的全序集合对交易进行编码,构造一个能使交易完全一一对应的编码向量。基于此,将交易保密验证问题转换为保密计算编码向量中部分元素累加问题。通过累加结果区分交易关系,结合椭圆曲线及同态特性进而解决交易保密验证问题。最后在半诚实模型下利用模拟范例证明了方法的正确性和安全性。理论分析表明,与已有方案相比,所提出的方法具有密钥短小、实用性强等优点。

Verification of transaction amount for ciphertext status,this paper used the principle of safe multi-party computing and proposed a new random two-state encoding method.Using this encoding method and randomly generated full-order set encoded transaction,this paper constructed a code vector that made the transaction completely match one by one.Therefore,it transformed the transaction confidentiality verification problem into the partial element confidentiality accumulation in coding vector.By accumulating the results to distinguish the transaction relationship,it combined with ECC and homomorphic characteristics to solve the problem of the transaction confidentiality verification.Finally it used the simulation example under the semi-honest model to prove the correctness and safety of the method.Theory analysis shows that compared with the existing methods,the proposed method has the advantages of short key and strong practicability.