diff options
Diffstat (limited to 'README')
| -rw-r--r-- | README | 30 |
1 files changed, 30 insertions, 0 deletions
@@ -0,0 +1,30 @@ +libuecc is a very small generic-purpose Elliptic Curve Cryptography library +compatible with Ed25519. + +Most documentation can be found as Doxygen comments in the ecc.h header +file. You can use `make doxygen` after running CMake to create HTML +documenation from it. + +There are two sets of functions converting between libuecc's internal point +representation and coordinates or compressed representation. The functions +ending with _ed25519 use the same representation as original Ed25519 +implementation and should be used by new software. The functions with the +suffix _legacy are provided for compatiblity with libuecc version before +v6. + +Ed25519 and the legacy representation are isomorphic, they use a Twisted +Edwards Curve + + ax^2 + y^2 = 1 + dx^2y^2 + +over the prime field for p = 2^255 - 19. + +Ed25519 uses the parameters + + a = -1 and + d = -(121665/121666), + +while the legacy curve has + + a = 486664 + d = 486660. |