Abstract:

How to guarantee the security of private data is a very important problem in electronic commerce. A resilient and distributed scheme of data security was proposed in this paper. The scheme introduced additive sharing and secret sharing technologies to improve the security of information content. The information data was stored among the total servers distributedly by additive sharing. At the same time, each information share was backed up among the servers set. Therefore, if an adversary could not corrupt more than quorum number of servers, he could not obtain the information data. The scheme has a nice resilient ability. It means servers can join or leave the servers group freely and the threshold value can be changed dynamically, which is especially useful in the circumstance where the ability of attacker is alterable.

Key words: secret sharing; distributed system; security of data; security