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Support Alternate M1 Proof #19

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TACIXAT opened this issue Jul 10, 2016 · 0 comments
Open

Support Alternate M1 Proof #19

TACIXAT opened this issue Jul 10, 2016 · 0 comments

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@TACIXAT
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TACIXAT commented Jul 10, 2016

Alternatively, in a password-only proof the calculation of "K" can be skipped and the shared "S" proven with:

Carol → Steve: M1 = H(A | B | SCarol). Steve verifies M1.
Steve → Carol: M2 = H(A | M1 | SSteve). Carol verifies M2.

Wikipedia.

It appears the JavaScript implementations of SRP use this proof. I think they're wrong as I can't find it in the RFC, but it might be nice to have the option for both in Python for interoperability.
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