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Simon Josefsson
ietf-eddsa
Commits
ca70220f
Commit
ca70220f
authored
Feb 16, 2015
by
Simon Josefsson
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draft-josefsson-eddsa-ed25519.txt
draft-josefsson-eddsa-ed25519.txt
+102
-46
draft-josefsson-eddsa-ed25519.xml
draft-josefsson-eddsa-ed25519.xml
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draft-josefsson-eddsa-ed25519.txt
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draft-josefsson-eddsa-ed25519.xml
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ca70220f
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@@ -67,12 +67,15 @@
<t>
Does not require the use of a unique random number for each
signature.
</t>
<t>
Collision resilience, meaning that hash-function collisions
do not break this system.
</t>
<t>
More resilient to side-channel attacks.
</t>
<t>
Small public keys (32 bytes) and signatures (64 bytes).
</t>
<t>
The formulas are "strongly unified", i.e., they are valid
for all points on the curve, with no exceptions.
</t>
<t>
Collision resilience, meaning that hash-function collisions
do not break this system.
</t>
</list></t>
<t>
For further background, see the original
<xref
...
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@@ -88,7 +91,7 @@
<t>
x^y x multiplied by itself y times
</t>
<t>
h_i the i'th b
yte
of h
</t>
<t>
h_i the i'th b
it
of h
</t>
<t>
a || b (bit-)string a concatenated with (bit-)string b
</t>
...
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@@ -100,8 +103,8 @@
<t>
-x^2 + y^2 = 1 + d x^2 y^2
</t>
<t>
It is required that q = 1 modulo 4 (which implies that -1
is
a square modulo q) and that d is a non-square modulo q. For
<t>
It is required that q = 1 modulo 4 (which implies that -1 is
a square modulo q) and that d is a non-square modulo q. For
Ed25519, the curve used is equivalent to curve25519, under a
change of coordinates, which means that the difficulty of the
discrete logarithm problem is the same as for curve25519.
</t>
...
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