Supersingular Isogeny Key Encapsulation

Repository stores implementation of SIKE based on field p503 in Go. It is small and condese implementation.

Implementation uses HMAC instead of cSHAKE.

Speed

This version is highly not optimized, it doesn't use any assembly.

> go test -run=. -bench=.             
goos: linux
goarch: amd64
BenchmarkKeygen-4   	 1000000	      1204 ns/op
BenchmarkEncaps-4   	      20	  54651908 ns/op
BenchmarkDecaps-4   	      20	  60516975 ns/op
PASS
ok  	_/home/hdc/repos/go-sike-p503	5.550s