[openpgp] Reducing the meta-data leak
"Neal H. Walfield" <neal@walfield.org> Tue, 03 November 2015 10:02 UTC
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Date: Tue, 03 Nov 2015 11:02:25 +0100
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From: "Neal H. Walfield" <neal@walfield.org>
To: IETF OpenPGP <openpgp@ietf.org>
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Subject: [openpgp] Reducing the meta-data leak
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Hi, At the IETF 94 OpenPGP WG session, Bryan, if I recall correctly, suggested that we should try and hide more meta-data. For instance, instead of listing the recipients, someone decrypting a message would try each of their available secret keys in turn. Werner pointed out that these probes are a pain for people who use a passphrase protected key and I mentioned that it is a pain for people who use a smartcard, in paritcular, those who use more than one smartcard. What about using a bloom filter for encoding the recipients? This, of course, doesn't eliminate the meta-data leak and it can lead to false positives (= gratuitious passphrase prompts / smartcard prompts), but it should reduce the metadata leak a fair amount, I think. Thoughts? Thanks, :) Neal
- [openpgp] Reducing the meta-data leak Neal H. Walfield
- Re: [openpgp] Reducing the meta-data leak Tom Ritter
- Re: [openpgp] Reducing the meta-data leak Derek Atkins
- Re: [openpgp] Reducing the meta-data leak Neal H. Walfield
- Re: [openpgp] Reducing the meta-data leak Derek Atkins
- Re: [openpgp] Reducing the meta-data leak Ben McGinnes
- Re: [openpgp] Reducing the meta-data leak Daniel Kahn Gillmor
- Re: [openpgp] Reducing the meta-data leak Ben McGinnes
- Re: [openpgp] Reducing the meta-data leak Daniel Kahn Gillmor
- Re: [openpgp] Reducing the meta-data leak vedaal
- Re: [openpgp] Reducing the meta-data leak Daniel Kahn Gillmor