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problem decrypting pgp5 mail.
Folks,

I guess I'm at a loss, I can't figure out why I am unable to
decrypt a message signed with PGP5. Following is a session log. Does
anyone have any ideas? Am I doing something that is unsupported?
Thanks.

---

% gpg -vvvvvvv --decrypt --load-extension rsa < encrypted.mail
gpg (GnuPG) 0.9.3; Copyright (C) 1999 Free Software Foundation, Inc.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions. See the file COPYING for details.

gpg: loaded digest 2
gpg: /usr/local/lib/gnupg/rsa: RSA ($Revision: 1.8 $)
gpg: /usr/local/lib/gnupg/rsa: provides pubkey algorithm 1
gpg: /usr/local/lib/gnupg/rsa: provides pubkey algorithm 2
gpg: /usr/local/lib/gnupg/rsa: provides pubkey algorithm 3
gpg: key C864D341: accepted as trusted key.
gpg: armor: BEGIN PGP MESSAGE
gpg: armor header: Version: PGP for Personal Privacy 5.0
gpg: armor header: MessageID: e5Bo+thQ8gHccdN3MkK+fR4jI9lFwpaN
:pubkey enc packet: version 3, algo 1, keyid 754FFB1D2DE30EC1
gpg: loaded pubkey 1 (RSA)
gpg: loaded pubkey 2 (RSA-E)
gpg: loaded pubkey 3 (RSA-S)
data: [1024 bits]
gpg: public key decryption failed: public key not found
:pubkey enc packet: version 3, algo 16, keyid 6EA29F0739245E09
data: [3070 bits]
data: [3072 bits]

You need a passphrase to unlock the secret key for
user: "jpr5@netect.com"
3072-bit ELG-E key, ID 39245E09, created 1999-01-19 (main key ID C864D341)

gpg: loaded digest 3
gpg: public key decryption failed: unknown cipher algorithm
:encrypted data packet:
length: 1952
gpg: decryption failed: secret key not available
%
Re: problem decrypting pgp5 mail. [ In reply to ]
Jordan Ritter <jpr5@darkridge.com> writes:

> gpg: public key decryption failed: unknown cipher algorithm

Probably this means IDEA - which is normally not supported.
I should add a note which cipher algorithm is unknown.


--
Werner Koch at guug.de www.gnupg.org keyid 621CC013