[TLS] TLS weakness in Forward Secrecy compared to QUIC Crypto

2016-04-08 Thread Jim Roskind
The combination of DHE and TLS 1.3 session resumption via session tickets, can destroy the forward secrecy property that DHE was intended to provide. With the proposed removal of DHE-based 0-RTT from TLS 1.3, session resumption is the mechanism by which 0-RTT connections are established. When adopt

Re: [TLS] TLS weakness in Forward Secrecy compared to QUIC Crypto

2016-04-08 Thread Eric Rescorla
On Fri, Apr 8, 2016 at 6:13 PM, Bill Cox wrote: > On Fri, Apr 8, 2016 at 1:50 PM, Jim Roskind wrote: > >> The combination of DHE and TLS 1.3 session resumption via session >> tickets, can destroy the forward secrecy property that DHE was intended to >> provide. With the proposed removal of DHE-

Re: [TLS] TLS weakness in Forward Secrecy compared to QUIC Crypto

2016-04-08 Thread Colm MacCárthaigh
On Fri, Apr 8, 2016 at 1:50 PM, Jim Roskind wrote: > If a symmetric-session-ticket-decryption-key was compromised by a server, > as a result of a break-in, or a subpoena, then all traffic that depended on > the session resumption tickets would be at risk. Moreover, a third party > attacker that

Re: [TLS] TLS weakness in Forward Secrecy compared to QUIC Crypto

2016-04-08 Thread Eric Rescorla
On Fri, Apr 8, 2016 at 6:42 PM, Wan-Teh Chang wrote: > On Fri, Apr 8, 2016 at 2:31 PM, Eric Rescorla wrote: > > > > ... TLS 1.3 supports two PSK-resumption modes: > > > > 1. Pure PSK, which has somewhat better security properties than in TLS > 1.2 > > 2. PSK-ECDHE, which has similar security pro

[TLS] [solwo...@rites.uic.edu: TLS weakness in Forward Secrecy compared to QUIC Crypto]

2016-04-08 Thread Tanja Lange
Looks like this didn't make it out to the list. Forwarding from my email address a message by Jon Solworth. - Forwarded message from "Jon A. Solworth" - Date: Fri, 8 Apr 2016 17:33:57 -0500 From: "Jon A. Solworth" To: tls@ietf.org, Tanja Lange , "D. J. Bernstein" , "W. Michael P

Re: [TLS] [solwo...@rites.uic.edu: TLS weakness in Forward Secrecy compared to QUIC Crypto]

2016-04-08 Thread Eric Rescorla
On Fri, Apr 8, 2016 at 10:26 PM, Tanja Lange wrote: > Looks like this didn't make it out to the list. Forwarding > from my email address a message by Jon Solworth. > > - Forwarded message from "Jon A. Solworth" > - > > Date: Fri, 8 Apr 2016 17:33:57 -0500 > From: "Jon A. Solworth" > To: