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Kenny Root authored
scrypt is a sequential memory-hard key derivation algorithm that makes it more difficult for adversaries to brute force passwords using specialized equipment. See http://www.tarsnap.com/scrypt/scrypt.pdf for more details of the algorithm. This adds support for initializing disk encryption using scrypt and upgrading from the previous PBKDF2 algorithm. Change-Id: I1d26db4eb9d27fea7310be3e49c8e6219e6d2c3b
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