[TLS] FW: New Version Notification for draft-mattsson-tls-psk-ke-dont-dont-dont-02.txt

2022-12-30 Thread John Mattsson
Hi, I submitted a new version of draft-mattsson-tls-psk-ke-dont-dont-dont. psk_ke is likely the weakest part of TLS 1.3 and German BSI has already made a deadline for its deprecation. It is long overdue to change the "Recommended" value for psk_ke to "N". This is a major update to earlier vers

[TLS] FW: New Version Notification for draft-ietf-lwig-security-protocol-comparison-06.txt

2022-12-30 Thread John Mattsson
Hi, We feel that draft-ietf-lwig-security-protocol-comparison is getting quite ready now that the included protocols are published or at least stable. We would love to have more examples of cTLS. Are there any more examples available? We currently included the example in the draft. Review by p

Re: [TLS] FW: New Version Notification for draft-ietf-lwig-security-protocol-comparison-06.txt

2022-12-30 Thread Achim Kraus
Hi John, just to mention, the CCM8 is also considered to be not recommended in the future (see https://mailarchive.ietf.org/arch/msg/core/WnRInwF-j0uZmLggFh37ySljnwE/). Wouldn't it make more sense to use then CCM instead (16 bytes tag length)? I would appreciate, if the comparison DTLS vs. TLS m

Re: [TLS] FW: New Version Notification for draft-mattsson-tls-psk-ke-dont-dont-dont-02.txt

2022-12-30 Thread Achim Kraus
Hi John, I'm not sure, are there any new arguments for this since this discussion https://mailarchive.ietf.org/arch/msg/tls/WoBwUCqEMcFhvIHN6neo5W4Urg4/ in 2020? Maybe, if the new arguments are highlighted, the discussion gets this time shorter. "Malicious actors can get access to long-term ke

Re: [TLS] FW: New Version Notification for draft-ietf-lwig-security-protocol-comparison-06.txt

2022-12-30 Thread John Mattsson
Hi Achim, Thanks. Good suggestions. Last time I looked at the process behind the suggested CCM8 deprecation it seemed like nonsense (using a single-key limits to suggest rekeying which did not improve security). I have not been following this topic during my parental leave. I think I need to h

Re: [TLS] FW: New Version Notification for draft-mattsson-tls-psk-ke-dont-dont-dont-02.txt

2022-12-30 Thread John Mattsson
>discussion gets this time shorter. Let’s hope so. I think quite a lot of things have happened since 2020. BSI decision that psk_ke can only be used until 2026, as well as a lot more discussion of exfiltration attacks and zero trust principles. I hope the working group can have a vote. >Are the

Re: [TLS] sslkeylogfile

2022-12-30 Thread John Mattsson
Thanks Martin, That seems much better. That is sufficient to me. John From: Martin Thomson Date: Friday, 25 November 2022 at 08:21 To: John Mattsson , Peter Gutmann , tls@ietf.org Subject: Re: [TLS] sslkeylogfile Thanks for the input John, I agree on both points, the minor one and the substa

Re: [TLS] sslkeylogfile

2022-12-30 Thread John Mattsson
>This file doesn't have any extra information than what would be in a >serialised >session data used for session resumption. Something plenty of software >already >does. I hope that is TLS 1.2 only. A TLS 1.3 implementation should not save any other keys than resumption_master_secret or PSKs deri