一种任意数量托管代理的密钥托管方案

A Key Escrow Scheme for Escrow Agency of Arbitrary Number

已有的密钥托管方案都要求恢复密钥的托管方数量相等 ,本文提出一种新的密钥托管方案 ,在恢复会话密钥时 ,可以是任意指定的托管方数量 ,托管方成员增加、减少、更换时 ,无需更改已托管的密钥碎片 ,密钥分拆和密钥恢复运算量各不超过 4n + 1次RSA运算 .n为托管代理总数 .

The known key escrow scheme requires equal number in key recover escrow side.This paper proposes a new key escrow scheme.In recovering session key,any assigned number of escrow side is allowable.When increasing,reducing and changing the member of escrow side,it is not necessary to modify the storing key part,and no more than 4n+1 (n is positive integer) RSA operations are needed respectively for key split or key recover.