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Class Information
Number: 380/257
Name: Cryptography > Communication system using cryptography > Circuit switched network (e.g., wired telephone)
Description: Subject matter wherein protection of the transmission or reception of information occurs in a system having plural nodes joined by switched physical links (usually two-way voice).

Sub-classes under this class:

Class Number Class Name Patents
380/41 Having quantizing and subsequent normalizing of signal (e.g., reentry telephone circuitry) 47

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8693686 Secure telephone devices, systems and methods Apr. 8, 2014
8675824 Systems and methods for secure recording in a customer center environment Mar. 18, 2014
8675825 Systems and methods for secure recording in a customer center environment Mar. 18, 2014
8675870 Encryption apparatus Mar. 18, 2014
8509437 Radio communication system, radio communication apparatus, and ciphering method Aug. 13, 2013
8509440 PANA for roaming Wi-Fi access in fixed network architectures Aug. 13, 2013
8503677 Communication system and device Aug. 6, 2013
8489874 Encryption STE communications through private branch exchange (PBX) Jul. 16, 2013
8374354 System and method to pass a private encryption key Feb. 12, 2013
8363836 Using authentication tokens to authorize a firewall to open a pinhole Jan. 29, 2013
8345871 Fast authentication over slow channels Jan. 1, 2013
8340295 High-speed cryptographic system using chaotic sequences Dec. 25, 2012
8290162 Combinational combiner cryptographic method and apparatus Oct. 16, 2012
8270606 Open architecture based domain dependent real time multi-lingual communication service Sep. 18, 2012
8254576 System and method for limiting access to data Aug. 28, 2012
8249238 Dynamic key exchange for call forking scenarios Aug. 21, 2012
8204223 System providing dynamic quality of service signaling messages in a cable telephony network Jun. 19, 2012
8194586 Cellular phone terminal having built-in wireless LAN, cellular phone system and personal information protection method therefor Jun. 5, 2012
8180053 Secure communications system with assured synchronization for data exchanged among system ports May. 15, 2012
8156192 E-mail messaging system and method for enhanced rich media delivery Apr. 10, 2012
8139566 System and method for establishing a communication session between two endpoints that do not both support secure media Mar. 20, 2012
8132264 Access authorization across processing devices Mar. 6, 2012
8086872 Method for setting security channel based on MPCP between OLT and ONUs in EPON, and MPCP message structure for controlling frame transmission Dec. 27, 2011
8073777 Integrated business systems for web based telecommunications management Dec. 6, 2011
8023654 Securing multimedia network communication Sep. 20, 2011
7940902 Method and apparatus for implementing card call service May. 10, 2011
7903810 Single instruction for data scrambling Mar. 8, 2011
7886143 Multi-data rate cryptography architecture for network security Feb. 8, 2011
7881471 Systems and methods for recording an encrypted interaction Feb. 1, 2011
7827398 Method for offloading encryption and decryption of a message received at a message server to remote end devices Nov. 2, 2010
7809820 Optimizing encrypted wide area network traffic Oct. 5, 2010
7796758 Method and apparatus for securing transmission on a speakerphone or teleconference call Sep. 14, 2010
7787625 QKD cascaded network with loop-back capability Aug. 31, 2010
7774602 Secure modem gateway concentrator Aug. 10, 2010
7756273 System and method for bit-reversing and scrambling payload bytes in an asynchronous transfer mode cell Jul. 13, 2010
7751557 Data de-scrambler Jul. 6, 2010
7751566 Apparatus using a time division multiple access bus for providing multiple levels of security in a communications system Jul. 6, 2010
7734041 System and method for de-scrambling and bit-order-reversing payload bytes in an Asynchronous Transfer Mode cell Jun. 8, 2010
7623664 System providing dynamic quality of service signaling messages in a cable telephony network Nov. 24, 2009
7580524 Method and apparatus for synchronizing the emitter and the receiver in an autocompensating quantum cryptography system Aug. 25, 2009
7570765 Method and an apparatus to perform secure real-time transport protocol-on-the-fly Aug. 4, 2009
7464401 Secure web access via an original CD Dec. 9, 2008
7436962 Method and apparatus for providing secured communication connections using a secured communication connection object Oct. 14, 2008
7370193 Computing system being able to quickly switch between an internal and an external networks and a method thereof May. 6, 2008
7308101 Method and apparatus for transporting encrypted media streams over a wide area network Dec. 11, 2007
7260222 Shared data refining device and shared data refining method Aug. 21, 2007
7222242 Interface for facilitating facsimile transmissions via wireless communications networks May. 22, 2007
7184553 Method and system for encryption of optical signals Feb. 27, 2007
7171554 Method, computer program product and system for providing a switch user functionality in an information technological network Jan. 30, 2007
7142648 System for securing messages recorded in an IP telephony network Nov. 28, 2006

1 2 3

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