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Re: Multikey crypto
> 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!
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