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| Number | Title | Issue Date |
| 7711122 | Method and apparatus for cryptographic key storage wherein key servers are authenticated by possession and secure distribution of stored keys A key management system includes secured data stored on a first system secured by a control key stored securely on a key server. The secured data is secured against attacks such as unauthorized use, modification or access, where authorization to access the secured d... | 05/04/2010 |
| 7634470 | Efficient searching techniques The present invention describes techniques for performing searches in an efficient manner while minimizing the memory resources required to perform the searches. According to the techniques of the present invention, the number of comparisons needed to determine if a... | 12/15/2009 |
| 7484092 | Techniques for searching encrypted files Techniques for efficiently searching encrypted searchable spaces. For example, embodiments of the present invention provide techniques for searching a plurality of files that are stored in encrypted (or ciphertext) form. According to embodiments of the present inven... | 01/27/2009 |
| 7454782 | Method and system for camouflaging access-controlled data A computer-representable object (including, without limitation, a cryptographic key, or a graph or a Boolean description of a system) is secured using a generalized camouflaging technique. The secured object need not be stored in the system, not even in encrypted fo... | 11/18/2008 |
| 7328350 | Method and apparatus for secure cryptographic key generation, certification and use A confidential datum, such as a private key used in public key signature systems, is secured in a digital wallet using a “generation camouflaging” technique. With this technique, the private key is not necessarily stored in the digital wallet, not even in an enc... | 02/05/2008 |
| 7181762 | Apparatus for pre-authentication of users using one-time passwords A computer program product for a client computing system including a processor includes code that directs the processor to request a challenge from a authentication server, code that directs the processor to receive the challenge from the authentication server via a... | 02/20/2007 |
| 7167565 | Efficient techniques for sharing a secret An n person secret sharing solution computes n unique keys to be distributed to the secret owners along with an exponentiated version of the secret. The custodian performs an exponent/modulo operation each time one of the keys is received from one of the secret owne... | 01/23/2007 |
| 6983381 | Methods for pre-authentication of users using one-time passwords A method for communicating passwords includes receiving at a server a challenge from a authentication server via a first secure communications channel, the challenge comprising a random password that is inactive, communicating the challenge from the server to a clie... | 01/03/2006 |
| 6959303 | Efficient searching techniques The present invention describes techniques for performing searches in an efficient manner while minimizing the memory resources required to perform the searches. According to the techniques of the present invention, the number of comparisons needed to determine if a... | 10/25/2005 |
| 6908030 | One-time credit card number generator and single round-trip authentication An online transaction is effected between a user system, a merchant system and an issuer system. The user system generates a one-time number (OTN) to use as a card number for a transaction with the merchant. The user system generates the OTN as a function of various... | 06/21/2005 |
