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Hash & IDs Runs offline

SHA1 Hash Generator

Generate a SHA-1 digest of any text.

Input

0 chars

Output

0 chars
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Questions

Is SHA-1 still considered secure?

No. A practical collision was demonstrated in 2017 (SHAttered) and the cost has fallen sharply since. Certificate authorities and browsers stopped accepting SHA-1 signatures years ago. Use SHA-256 or better for anything where collision resistance matters.

Why does Git still use SHA-1?

For historical reasons and because Git uses hashes as content addresses rather than as a security boundary. Git has added collision detection and a migration path to SHA-256, but existing repositories continue to use SHA-1 object names.