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Class Information
Number: 380/266
Name: Cryptography > Communication system using cryptography > Symmetric key cryptography > Including a modem
Description: Subject matter including a device converting a digital signal to a signal suitable for telephone network transfer.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7568223 |
Internet protocol telephony security architecture |
Jul. 28, 2009 |
| 7522727 |
Method and apparatus for providing authentication in a communication system |
Apr. 21, 2009 |
| 7424116 |
Method and apparatus for providing authentication in a communication system |
Sep. 9, 2008 |
| 7418598 |
Architecture of an encryption circuit implementing various types of encryption algorithms simultaneously without a loss of performance |
Aug. 26, 2008 |
| 7325250 |
Method and apparatus for preventing radio communication system access by an unauthorized modem |
Jan. 29, 2008 |
| 7308103 |
Power line communication device and method of using the same |
Dec. 11, 2007 |
| 7231045 |
Secure transaction modem storing unique indicia |
Jun. 12, 2007 |
| 7222242 |
Interface for facilitating facsimile transmissions via wireless communications networks |
May. 22, 2007 |
| 7206933 |
Software modem with privileged mode driver authentication |
Apr. 17, 2007 |
| 7197768 |
Software modem for communicating data using encrypted data and unencrypted control codes |
Mar. 27, 2007 |
| 7123719 |
Method and apparatus for providing authentication in a communication system |
Oct. 17, 2006 |
| 7096353 |
Software modem with privileged mode decryption of control codes |
Aug. 22, 2006 |
| 7061985 |
Universal modulator/demodulator |
Jun. 13, 2006 |
| 6961431 |
Analog privacy scrambler and scrambling method |
Nov. 1, 2005 |
| 6947968 |
Communication apparatus and method |
Sep. 20, 2005 |
| RE38739 |
Facsimile apparatus |
May. 31, 2005 |
| 6859650 |
Mobile device, chip card and method of communication |
Feb. 22, 2005 |
| 6856687 |
Portable telecommunication security device |
Feb. 15, 2005 |
| 6856686 |
Method and apparatus for securing e-mail attachments |
Feb. 15, 2005 |
| 6715079 |
Method and system for soft modem protection |
Mar. 30, 2004 |
| 6681016 |
System for transfer of secure mission data |
Jan. 20, 2004 |
| 6498851 |
Data encryption and signal scrambling using programmable data conversion arrays |
Dec. 24, 2002 |
| 6496107 |
Voice-controlled vehicle control system |
Dec. 17, 2002 |
| 6430691 |
Stand-alone telecommunications security device |
Aug. 6, 2002 |
| 6243468 |
Software anti-piracy system that adapts to hardware upgrades |
Jun. 5, 2001 |
| 6181735 |
Modem equipped with a smartcard reader |
Jan. 30, 2001 |
| 6075863 |
Intelligent communication device |
Jun. 13, 2000 |
| 6049826 |
Method and system for cable modem initialization using dynamic servers |
Apr. 11, 2000 |
| 5978481 |
Modem compatible method and apparatus for encrypting data that is transparent to software applications |
Nov. 2, 1999 |
| 5835590 |
Method and apparatus for signal transmission and reception |
Nov. 10, 1998 |
| 5835603 |
Financial transaction system |
Nov. 10, 1998 |
| 5818937 |
Telephone tone security device |
Oct. 6, 1998 |
| 5805712 |
Apparatus and method for providing secured communications |
Sep. 8, 1998 |
| 5778071 |
Pocket encrypting and authenticating communications device |
Jul. 7, 1998 |
| 5621800 |
Integrated circuit that performs multiple communication tasks |
Apr. 15, 1997 |
| 5594798 |
Secure telecommunications |
Jan. 14, 1997 |
| 5517569 |
Methods and apparatus for interfacing an encryption module with a personal computer |
May. 14, 1996 |
| 5455861 |
Secure telecommunications |
Oct. 3, 1995 |
| 5412730 |
Encrypted data transmission system employing means for randomly altering the encryption keys |
May. 2, 1995 |
| 5410599 |
Voice and data encryption device |
Apr. 25, 1995 |
| 5369703 |
Command and control signalling method and apparatus |
Nov. 29, 1994 |
| 5335276 |
Communication system and methods for enhanced information transfer |
Aug. 2, 1994 |
| 5311596 |
Continuous authentication using an in-band or out-of-band side channel |
May. 10, 1994 |
| 5253293 |
Adaptive data ciphering/deciphering apparatuses and data communication system using these apparatuses |
Oct. 12, 1993 |
| 5241596 |
Facsimile apparatus, and method of controlling same |
Aug. 31, 1993 |
| 5222136 |
Encrypted communication system |
Jun. 22, 1993 |
| 5166977 |
Protocol converter for a secure FAX transmission system |
Nov. 24, 1992 |
| 5146472 |
Method for imbedding information in modem handshake procedure and modems incorporating the same |
Sep. 8, 1992 |
| 5131025 |
Intelligent modem system which determines proper access thereto |
Jul. 14, 1992 |
| 5056137 |
Method and apparatus for encoding and decoding signals |
Oct. 8, 1991 |
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