SHA-256 is a cryptographic hash function developed by the NSA in 2001 that converts any input into a fixed 256-bit output, serving as the foundation of Bitcoin’s proof-of-work consensus mechanism.

I saw that Microsoft is phasing out SHA-1 support as of Jan. 1, 2016, but nearly all of the production Web servers on the Internet still use it, including ours. In the wake of Heartbleed, is it time ...