David Shaw just pointed out that PGP2.6.2 chokes when it receives a
message that has been encrypted to a v4 key, even when it has been
encrypted to a v3 key, too.
I can only assume that this is because public-key encrypted session
key packets allow non-RSA cipher material. Can anybody who has a
working knowledge of the old code confirm this?
If this is the case, would it be possible to introduce a v4 packet of
that type? Would that be ignored by PGP2, so that having both v3 and
v4 public key encrypted session key packets would work with pgp2?
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