.SHA1 File Extension
File TypeSHA-1 Hash File
What is an SHA1 file?
File containing a "block" used by a SHA-1 block cipher cryptographic algorithm; typically stores a series of bits, or characters, that are used for verifying an identity when run through the SHA-1 hash function.
When hosting a file for download, sometimes a developer will also provide a ".sha1" file that the user can use to verify that the file is authentic and not corrupted.