1
Akhteruzzaman, Amitava Hazra: Universal authentication device for use over telephone lines. AT&T, Werner Ulrich, April 11, 1995: US05406619 (119 worldwide citation)

This invention relates to a universal authenticator for use with an ordinary telephone station over an ordinary telephone line. The authenticator, which is the size and shape of a credit card, receives a query number by being held against the receiver of the telephone station and receiving audio sig ...


2
Amitava Hazra, Joseph E Wilkes: Universal authentication device for use over telephone lines. AT&T, July 28, 1998: US05787154 (37 worldwide citation)

A method is provided for securely transmitting information from a telephone to a calling party over a telephone network. In accordance with the method, encrypted audio signals are received from the telephone over a communication path to an authentication mechanism that may be located in the telephon ...


3
Hazra Amitava, Wilkes Joseph E: Universal authentication device for use over telephone lines. At & T, January 14, 1998: EP0818757-A2 (33 worldwide citation)

A method is provided for securely transmitting information from a telephone to a calling party over a telephone network. In accordance with the method, encrypted audio signals are received from the telephone over a communication path to an authentication mechanism that may be located in the telephon ...


4
Akhteruzzaman, Hazra Amitava: A universal authentication device for use over telephone lines.. American Telephone & Telegraph, October 13, 1993: EP0565279-A2 (16 worldwide citation)

This invention relates to a universal authenticator (FIG. 4) for use with an ordinary telephone station over an ordinary telephone line. The authenticator, which is the size and shape of a credit card, receives a query number (at 421) by being held against the receiver of the telephone station and r ...


5
Akhteruzzaman, Hazra Amitava: A universal authentication device for use over telephone lines. American Telephone And Telegraph Company, February 21, 1993: TW200624 (1 worldwide citation)

This invention relates to a universal authenticator for use with ?an ordinary telephone station over an ordinary telephone line. ?The authenticator, which is the size and shape of a credit card, ?receives a query number by being held against the receiver of the ?telephone station and receiving audio ...


6
Raymond Anthony Joao: Transaction security apparatus and method. GTJ VENTURES, Raymond A Joao Esq, March 6, 2018: US09911124

A transaction security apparatus, including an input device or receiver for inputting or receiving transaction information regarding a transaction on or involving an account, a camera or video recording device for obtaining or recording a photograph or video clip of an individual involved in the tra ...


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Akhteruzzaman, Hazra Amitava: Dispositif dauthentification universel pour lignes telephoniques, Universal authentication device for use over telephone lines. American Telephone And Telegraph Company, KIRBY EADES GALE BAKER, October 8, 1996: CA2087886

This invention relates to a universal authenticator for use with anordinary telephone station over an ordinary telephone line. The authenticator, whichis the size and shape of a credit card, receives a query number by being held againstthe receiver of the telephone station and receiving audio signal ...


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