An algorithm we’ve depended on for most of the life of the Internet — SHA-1 — is aging, due to both mathematical and technological advances. Digital signatures incorporating the SHA-1 algorithm may soon be forgeable by sufficiently-motivated and resourceful entities. Via our and others’ work in the CA/Browser Forum, following our deprecation plan announced last year and per recommendations by NIST
![Phasing Out SHA-1 on the Public Web – Mozilla Security Blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/3edcf8fc3d8dccaaaf948b4d3355440f35b34b36/height=288;version=1;width=512/https%3A%2F%2Fblog.mozilla.org%2Fsecurity%2Fwp-content%2Fthemes%2FOneMozilla%2Fimg%2Fmozilla-wordmark.png)