A Web service cannot be SHA-1 encrypted, just because SHA-1 is not encryption by is a
cryptographic hash function, which cannot be used for encryption and decryption in principle, period. Please see:
http://en.wikipedia.org/wiki/Cryptographic_hash_function[
^],
http://en.wikipedia.org/wiki/SHA-1[
^].
By the way, please read the last article: SHA-1 is considered broken and should not be used at all where security is required.
—SA