摘要： 密码算法常用来设置文件的鉴别标识,但若每次文件修改后都要重新计算,则效率太低。增量加密就是想设计一种算法,可快速地将修改后文件的鉴别标识用加密防护方法改好而不是重新计算。利用标识鉴别方法,还可用在病毒防护中。

关键词: 增量加密, 鉴别标识, 病毒

Abstract: Cryptography is often applied to set authentication-tag of documents.If documents are modified, however, it is inefficient to re-compute the result from scratch.The goal of incremental cryptography is to design cryptographic algorithms, which can quickly update the results of the algorithms for a modified document, rather than having to re-compute it from scratch.One such setting is applied to virus protection.

中图分类号: 

• TP309.7