| http://www.w3.org/ns/prov#value | - The key is encrypted by encoding, for example, by hashing, private information such as mother's maiden name and social security number, and the result...http://www.google.co.uk/patents/US6160891?utm_source=gb-gplus-sharePatent US6160891 - Methods and apparatus for recovering keysAdvanced Patent SearchPublication numberUS6160891 APublication typeGrantApplication numberUS 08/954,170Publication date1
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