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Re: [openpgp] [openpgp-email] Keyserverless Use of OpenPGP in Email

"Neal H. Walfield" <neal@walfield.org> Tue, 12 April 2016 14:53 UTC

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Date: Tue, 12 Apr 2016 16:53:23 +0200
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From: "Neal H. Walfield" <neal@walfield.org>
To: OpenPGP-based Email Encryption <openpgp-email@enigmail.net>
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Cc: Simon Josefsson <simon@josefsson.org>, IETF OpenPGP <openpgp@ietf.org>, Vincent Breitmoser <look@my.amazin.horse>
Subject: Re: [openpgp] [openpgp-email] Keyserverless Use of OpenPGP in Email
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On Tue, 12 Apr 2016 16:34:30 +0200,
Ruben Pollan wrote:
> We even dream to have some crappy forward secrecy by rotating encryption 
> subkeys often, and deleting them from the keyring.

Take a look at puncture encryption:

  https://isi.jhu.edu/~mgreen/forward_sec.pdf

Matt wants to see this get integrated into OpenPGP at some point, but
there are some issues.  For instance, using puncture encryption, the
private key can get larger than 64k, which is the current limit for
OpenPGP private keys.

:) Neal

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