An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Hash functions (H) map input data (x) to fixed size outputs (h) called hash values. Cryptographic hash functions are non-invertible in that an input maps to a given hash value but not vice versa (i.e., the input cannot be reconstructed from the hash value)