网络环境中基于RSA算法的密钥托管
A KEY ESCROW SYSTEM FOR NETWORK ENVIRONMENT BASED ON RSA ALGORITHM
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摘要: 密钥托管密码体制不仅能保护用户的隐私权,同时允许法律授权下的监听。本文提出了在网络环境中基于RSA算法的一种密钥托管体制。系统中有一可信中心,为每一用户指定n个委托人,每一委托人为网络中一服务器。可信中心按(t,n)门限方案为n个委托人分配恢复用户密钥的部分能力。用户在系统中广播自己经过加密的密钥时,仅当至少有t个委托人联合起来才能实施对用户的监听。Abstract: A key escrow cryptosystem can provide protection for user s privacy, while at the same time, allows for the wiretapping when lawfully authorized. In this paper, a key escrow system based on RSA algorithm for network environment is given. A trusted center in this system specifies n trustees for every user, and distributes the part recovery ability of the user 's secret key to n trustees by (t,n) threshold scheme. When the user broadcasts his encrypted key, only if at least t cooperated trustees can enforce the wiretapping to this user.
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