Has anyone ever done anything with an encryption scheme that allows multiple unlocking keys? What I'm thinking about is a way to encrypt some data and then create multiple keys that will decrypt the data. I want to be able to encrypt a document and then give multiple people access to the document and be able to lock out a key and/or generate new keys without having to redistribute keys to everybody that already has one. --> Mike Markley
I was thinking about this the other day.. and my first reaction was the following. What if you encrypted the document with p/k and made multiple copies of the same [private] key. Then you encrypted each copy of the key with a user's public key. Now each user has a copy of the private key. If you decide Joe SHOULDN'T have access to the data anymore, you can re-encrypt the document and redistribute the p/k encrypted copies of the key. There may be some fancy algorithms to achieve more security.. and ease of use.. but that's the answer I came up with. TTFN! -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - DrZaphod #Don't Come Any Closer Or I'll Encrypt! - - [AC/DC] / [DnA][HP] #Xcitement thru Technology and Creativity - - [drzaphod@brewmeister.xstablu.com] [MindPolice Censored This Bit] - - 50 19 1C F3 5F 34 53 B7 B9 BB 7A 40 37 67 09 5B - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-