I've boostified, cleaned up, and documented the Hash Library I mentioned here about a month ago. Comments, complaints, suggestions, and questions appreciated. Source code is in the sandbox at http://svn.boost.org/svn/boost/sandbox/hash/ Documentation can be read online at http://www.cs.mcgill.ca/~smcmur/hash/ I was very pleased by how the implementation came together, as templates mean that all the hash algorithms share a substantial portion of their code. Those details are all hidden from the user, though. Here's an example showing the simplest use of the library: #include <boost/hash.hpp> #include <iostream> #include <string> int main() { std::string s = "Hello World!"; typedef boost::hash::sha2<256> HashPolicy; HashPolicy::digest_type digest = boost::hash::compute_digest<HashPolicy>(s); std::cout << digest << "\n"; } Thanks, ~ Scott McMurray