Re: [TLS] Comments on EndOfEarlyData

2017-05-23 Thread Markulf Kohlweiss
channel, e.g. some requests may have strong replay protection, others won’t. --markulf From: Benjamin Kaduk [mailto:bka...@akamai.com] Sent: 23 May 2017 18:35 To: Markulf Kohlweiss <mark...@microsoft.com>; tls@ietf.org Cc: Samin Ishtiaq <samin.isht...@microsoft.com>; Antoine Del

Re: [TLS] Comments on EndOfEarlyData

2017-05-23 Thread Markulf Kohlweiss
Dear Eric, Britta, I am paraphrasing a long thread on the issue that we had within the miTLS development team, and I am primarily commenting on the analysis aspects. I also hope that it will clarify any remaining problems of understanding that I have on the issue. If we see EOED as a stream

Re: [TLS] [Cfrg] Closing out tls1.3 "Limits on key usage" PRs (#765/#769)

2017-02-13 Thread Markulf Kohlweiss
Hello, Our analysis of miTLS also supports option a) A security level of 2^-32 seems too low from a provable security point of view, especially for a confidentiality bound. We verified an implementation of the TLS 1.3 record (https://eprint.iacr.org/2016/1178, to appear at Security & Privacy