SHA-256 is the recommended stronger alternative to SHA-1. See FIPS PUB 180-4 for implementation details.

Either by using a dedicated library or implementing the algorithm in your language, show that the SHA-256 digest of the string "Rosetta code" is: 764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf

 
# Project: SHA-256
 
load "stdlib.ring"
str = "Rosetta code"
see "String: " + str + nl
see "SHA-256: "
see sha256(str) + nl
 