[Announce] Attack against OpenPGP encryption
Atom Smasher
atom at smasher.org
Fri Feb 11 22:05:17 CET 2005
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Hash: SHA256
as is obvious by my questions, i don't understand the math.
http://www.pgp.com/library/ctocorner/openpgp.html
Consequently, PGP Corporation, GnuPG, and Hush Communications are
all disabling the quick check for all public key-encrypted
messages and files. However, we are all presently leaving it in
for symmetric (passphrase) encrypted messages and files because we
believe the benefit of the quick check is greater than the
security risk from it. You will see this change in the next
software release from each group.
what about data that is encrypted with both a symmetric and asymmetric
key?
In our discussions with Mister and Zuccherato about their attack,
we asked if they thought we should revise the protocol to address
the problem. They told us they didn't think it was necessary-that
an explanation of the issue and how to avoid it was good enough.
As implementers of OpenPGP systems, however, we think we should
update the protocol. People trust OpenPGP because we handle issues
before they become real-world problems...
how could this "become" a real world problem? is it conceivable that it
might be leveraged into a stronger attack?
We are suggesting in the working group that we amend OpenPGP so
there is a new symmetric encryption system that has a secure quick
check.
like using a strong hash for the quick check? wouldn't that also benefit
symmetric encryption with no significant increase in computational
resources?
- --
...atom
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PGP key - http://atom.smasher.org/pgp.txt
762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
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the proper distribution of power. One believes in a
completely equal distribution of political power, 'one man,
one vote', while the other believes that it is the duty of
the economically fit to drive the unfit out of business and
into economic extinction, and inequalities in purchasing
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and firms become efficient to be rich. To put it in its
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two centuries. Democracy is not compatible with slavery."
-- Lester Thurow, The Future of Capitalism
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Comment: What is this gibberish?
Comment: http://atom.smasher.org/links/#digital_signatures
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