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8.4 Encryption types

Windows 2000 supports both the standard DES encryptions (`des-cbc-crc' and `des-cbc-md5') and its own proprietary encryption that is based on MD4 and RC4 that is documented in and is supposed to be described in draft-brezak-win2k-krb-rc4-hmac-03.txt. New users will get both MD4 and DES keys. Users that are converted from a NT4 database, will only have MD4 passwords and will need a password change to get a DES key.