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The initiative encountered massive resistance from the cryptographic community, and eventually the US government abandoned the effort. The main reasons for this resistance were concerns about
Skipjack's design, which was
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standards for public and government use. Capstone was authorized by the
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that included the
Skipjack algorithm, a digital signature algorithm,
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The initiative involved four standard algorithms: a data
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protocol. Capstone's first implementation was in the
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135:RSA Laboratories FAQ on Cryptography entry
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150:EFF archives on Capstone
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68:SHA-1
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