1
David P Cook: Secure message forwarding system detecting user's preferences including security preferences. Zix Corporation, Fish & Richardson P C, May 4, 2004: US06732101 (366 worldwide citation)

A system and method for providing secure E-mail services. The system includes a forwarding service to receive an E-mail message for delivery to a recipient. The system checks for recipient preferences for delivery of the E-mail message content including encryption preferences and notifies the recipi ...


2
David P Cook, Gary G Liu: Transaction authorization system. Zix Corporation, Fish & Richardson P C, January 6, 2004: US06675153 (254 worldwide citation)

A method and apparatus for authorizing a transaction between a consumer and a merchant over a network where the anonymity of the consumer with respect to the merchant is maintained while still validating the authenticity of the consumer prior to completing the transaction. The method includes regist ...


3
Gary G Liu, David P Cook: Secure transmission system. Zix Corporation, Fish & Richardson P C, July 6, 2004: US06760752 (243 worldwide citation)

A method and apparatus for transferring a message securely from a sender to a recipient over a network and includes at each transfer: creating a message; retrieving the public key of the recipient from an external key server just prior to sending the message; signing the message using the private ke ...


4
David P Cook: Centralized authorization and fraud-prevention system for network-based transactions. Zixit Corporation, Haynes and Boone, February 8, 2005: US06853987 (114 worldwide citation)

A system and method for authorizing certain aspects of network based transactions between a customer and a merchant is disclosed. The system utilizes an account code for identifying rights to use an account identified by an account number, and a database for storing the account number, account code, ...


5
David P Cook: Secure message forwarding system detecting users preferences including security preferences. Zix Corporation, Fish & Richardson P C, January 6, 2009: US07475256 (40 worldwide citation)

A system and method for providing secure message services. The system includes a forwarding service to receive message for delivery to a recipient. The system checks for preferences for delivery of the message content including encryption preferences and notifies the recipient or delivers the messag ...


6
Gary G Liu, David P Cook: Secure transmission system. Zix Corporation, Fish & Richardson P C, February 17, 2009: US07493661 (38 worldwide citation)

A method and apparatus for transferring a message securely from a sender to a recipient over a network and includes at each transfer: creating a message; retrieving the public key of the recipient from an external key server just prior to sending the message; signing the message using the private ke ...


7
David P Cook, Eric Schaufert, Robert E Schmidt: Method for automatic transceiver selection in a mobile multiple RF transceiver apparatus. Ericsson, Nixon & Vanderhye P C, December 21, 1999: US06006106 (37 worldwide citation)

A multi-radio equipment arrangement comprises multiple transceivers of different band splits. A preferred arrangement utilizes at least one transceiver for communicating on digital "trunked" RF communications system and at least one transceiver for communicating on a wide-area "conventional" RF comm ...


8
David P Cook, Gary G Liu: Secure messaging using a trusted third party. Fish & Richardson P C, May 13, 2014: US08726009 (24 worldwide citation)

A system and method to send a secure message from a sender to a recipient using strong encryption protocols without the need for the recipient to create a public/private key pair and by using a third party to appropriately identify the recipient without revealing actual identification information to ...


9
Gary G Liu, David P Cook: Secure pipeline processing. Zix Corporation, Fish & Richardson P C, August 11, 2009: US07574607 (11 worldwide citation)

Methods and apparatus for secure transmission of data in pipeline fashion. A pair of transaction certificates can be used to verify the authenticity and integrity of data transmitted in more than one block.


10
David P Cook: Centralized authorization and fraud-prevention system including virtual wallet for network-based transactions. ZixIt Corporation, Fish & Richardson P C, March 12, 2013: US08396810 (7 worldwide citation)

A system and method for authorizing certain aspects of network based transactions between a customer and a merchant is disclosed.