9 lines
447 B
Plaintext
9 lines
447 B
Plaintext
The Digest::Hashcash Perl module calculates n-bit partial hash
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collisions on chosen texts.
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The idea of using partial hashes is that they can be made arbitrarily
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expensive to compute (by choosing the desired number of bits of
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collision), and yet can be verified instantly. This can be used as the
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basis for an e-cash system measured in burnt CPU cycles. Such cash
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systems can be used to throttle systematic abuses of un-metered internet
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resources.
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