From: "Perry E. Metzger" <perry@piermont.com>
Date: Wed, 8 Nov 1995 22:17:03 +0800
To: John Curtis <jbell@capecod.net>
Subject: Re: expiration dates on cryptography
In-Reply-To: <01BAADAA.DFB5F740@hy36.capecod.net>
Message-ID: <199511081406.JAA00267@jekyll.piermont.com>
MIME-Version: 1.0
Content-Type: text/plain



John Curtis writes:
> The discussion between Mr. May and Mr. Shields concerning
> time-release cryptograhy raised an interesting question in my 
> mind.
> 
> Given that trust is often of an ephemeral nature, it would be
> quite useful to set time limits on secrets.  Would it be possible
> to cryptographically protect a secret such that it could not be
> decrypted after a certain time?

No.

.pm