According to the Diffie-Hellman key exchange get affected by logjam, and openID uses this to establish an association. So how this going to affect OpenID?
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I would checkout this question/answer for details on Logjam – RoraΖ May 21 '15 at 13:00
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logjam is not (even remotely) a break of the Diffie-Hellman key exchange method. It is a weakness of the TLS protocol. It affects only sessions, not credentials. It will soon be fixed. I estimate zero impact on OpenID. The "bad guys" cannot do MITM, only governments and ISPs could (in principle) do MITM.
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There are plenty of opportunities for even run of the mill bad guys to MITM... Running rogue hotspots in hotels/airports/etc... makes it very easy to achieve... – Bruno Rohée Oct 16 '15 at 17:31