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seen Feb 18 '12 at 12:30

Nov
2
comment Threshold Secret sharing - How to create a shared secret from pre existing secret parts?
Thank you for your answer, it's very interested, but about the shamir's secret sharing, to my knowledge, we cannot create a secret from n pre-existing secrets (xi) where any t<n of theme are sufficient to find the generated secret.
Nov
2
comment Threshold Secret sharing - How to create a shared secret from pre existing secret parts?
Thank you for the answer. Yes of course, I'm interested in my previous question. The Diffie-Hellman key exchange is a good idea to create and share a secret from a set of other pre-existing secrets, but I do not understand why you say that "this only works when t=1" Please, can you explain me what do you mean by that?
Nov
1
comment Threshold Secret sharing - How to create a shared secret from pre existing secret parts?
Yes, it is the same. At the beginning, the secret S does not exist, it will be generated by the "n" pre-existing secrets "xi", then, the resulting secret S (the same) may be found from any t out of n secret "xi"
Nov
1
comment Is there a secret sharing scheme which allows sharing of a secret (one-out-of-n)
this is a Good Idea
Nov
1
comment Is there a secret sharing scheme which allows sharing of a secret (one-out-of-n)
thank you for the answer, Let me ask the question another way, assume a group of participants (Pi) each one holds a secret Si, suppose that these secrets (Si) are the shares of a given secret "S" where S is not equal to Si and any participant is able to derive the secret S using just its share Si (without combining with secrets of other shares), is there a secret sharing scheme allowing that ?