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Analysis: Enterprise Key Management: Page 12 of 16

Good Crypto: Has a long history of being vetted by the cryptography community.

Bad Crypto: Says, "I'm secure because nobody understands how I work!"

Good Crypto: Is validated by well-respected standards like FIPS 140-2

Bad Crypto: Says "I use FIPS cryptography too!" ... without mentioning that there's a difference between FIPS 140-2 module validation and using FIPS cryptography.

Good Crypto: Uses the right tool for the right task, much as BitLocker was carefully designed to use AES CBC with the Elephant Diffuser. See Microsoft's explanation of its choice of algorithms for a surprisingly understandable and easy-to-read guide to choosing cryptography protocols.