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| A KEY ESCROW SYSTEM FOR NETWORK ENVIRONMENT BASED ON RSA ALGORITHM |
| Yang Bo; Wang Yumin |
| National Key Laboratory on ISN Xidian University Xi 'an 710071 |
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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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Received: 29 June 1998
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2000, Vol. 22 
