Andrew Koenig (programmer) - Patents

Patents

• User Authentication System Employing Encryption Functions, #4,590,470. "Combines public-key random challenge-response authentication with hiding the authentication algorithm in a device that makes available only the algorithm's inputs and outputs. That secures the session against eavesdropping and replay and requires no secret information on the host."
• Storing trees in navigable form, #5,530,957. "A technique for storing trees (such as representations of source programs in a programming environment) that completely eliminates space overhead normally associated with storing pointers, while still permitting common navigational operations with reasonable time efficiency."
• Method and apparatus for parsing source code using prefix analysis, #5,812,853, "A technique for speeding up preliminary processing, such as macro preprocessing, in a compiler by remembering useful prefix strings of the input program in a tree-like data structure and keying those strings to remembered states of the compiler."
• Method and apparatus for paging alternate users, #6,057,782, "The idea of allowing paging systems that support acknowledgments to reorder their list of destinations for future pages based on the acknowledgment or lack thereof on previous pages."