1
Robert C Schwalm, Gerhard P H Deffner: System and method for authenticating transmission and receipt of electronic information. Texas Instruments Incorporated, Robby T Holland, James C Kesterson, Richard L Donaldson, August 16, 1994: US05339361 (78 worldwide citation)

A communication system (10 and 100) is provided with a verification mechanism (16) to identify both the sender and recipient of electronic information (20). Input devices (12) in cooperation with verification mechanism (16) may be used to confirm the identity and authority of a sender to place elect ...


2
Michael L McMahan, Gerhard P H Deffner, Billy W Hensley: Transparent telephone access system using voice authorization. Texas Instruments Incorporated, Bret J Petersen, James Kesterson, Richard Donaldson, February 10, 1998: US05717743 (36 worldwide citation)

A transparent telephone access system using voice authorization includes a method and system (30 and 60) to protect against the unauthorized use of telephone network (20). By receiving a spoken telephone number (14) from telephone unit (16) and recognizing the spoken phrase that corresponds to telep ...