Ralph C Merkle: Method of providing digital signatures. The Board of Trustees of the Leland Stanford Junior University, Flehr Hohbach Test Albritton & Herbert, January 5, 1982: US04309569 (352 worldwide citation)

The invention comprises a method of providing a digital signature for purposes of authentication of a message, which utilizes an authentication tree function of a one-way function of a secret number.

Steven M Hoffberg: System and method for determining contingent relevance. Steven M Hoffberg Esq, Ostrolenk Faber, November 14, 2017: US09818136 (5 worldwide citation)

A system and method providing for communication and resolution of utility functions between participants, wherein the utility function is evaluated based on local information at the recipient to determine a cost value thereof. A user interface having express representation of both information elemen ...