CA2128305A1 - Secure Telecommunications - Google Patents

Secure Telecommunications

Info

Publication number
CA2128305A1
CA2128305A1 CA2128305A CA2128305A CA2128305A1 CA 2128305 A1 CA2128305 A1 CA 2128305A1 CA 2128305 A CA2128305 A CA 2128305A CA 2128305 A CA2128305 A CA 2128305A CA 2128305 A1 CA2128305 A1 CA 2128305A1
Authority
CA
Canada
Prior art keywords
encrypted
information
parties
node
different
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2128305A
Other languages
French (fr)
Other versions
CA2128305C (en
Inventor
Richard Vandervoort Cox
Michael M. Kaplan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Colorado Foundation Inc
Original Assignee
American Telephone and Telegraph Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2128305A1 publication Critical patent/CA2128305A1/en
Application granted granted Critical
Publication of CA2128305C publication Critical patent/CA2128305C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/16—Automatic or semi-automatic exchanges with lock-out or secrecy provision in party-line systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/60—Aspects of automatic or semi-automatic exchanges related to security aspects in telephonic communication systems
    • H04M2203/609—Secret communication

Abstract

A security node disposed in the telecommunications network connecting calling and called parties transforms information (which can be voice, data, facsimile, video and other types of calls or messages) encrypted in a first format to (a) encrypted information in a different format or to (b) non-encrypted information, and vice-versa. The node is accessible from any location connected to the network.
By routing calls or messages originated by the calling party and destined for the called party via the security node, and providing appropriate control signals to the node, the information may be encrypted only over a portion of the transmission path between the parties, and clear over the remainder of the transmission path.
Alternatively, the information may be encrypted in different portions of the path using different encryption algorithms. This arrangement enables the parties to obtain relatively secure communications even if only one party has a security device at the originating or terminating end, or if the parties have security devices using different handshaking protocols and encryption algorithms.
CA002128305A 1993-08-27 1994-07-18 Secure telecommunications Expired - Fee Related CA2128305C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US113,376 1993-08-27
US08/113,376 US5434920A (en) 1991-12-09 1993-08-27 Secure telecommunications

Publications (2)

Publication Number Publication Date
CA2128305A1 true CA2128305A1 (en) 1995-02-28
CA2128305C CA2128305C (en) 2000-06-27

Family

ID=22349051

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002128305A Expired - Fee Related CA2128305C (en) 1993-08-27 1994-07-18 Secure telecommunications

Country Status (4)

Country Link
US (2) US5434920A (en)
EP (1) EP0642277A3 (en)
JP (1) JPH07203000A (en)
CA (1) CA2128305C (en)

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US9326135B2 (en) * 2008-02-21 2016-04-26 Google Technology Holdings LLC Method and apparatus for secure communication in a digital two way radio protocol
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Also Published As

Publication number Publication date
EP0642277A2 (en) 1995-03-08
EP0642277A3 (en) 1998-03-18
US5434920A (en) 1995-07-18
JPH07203000A (en) 1995-08-04
US5594798A (en) 1997-01-14
CA2128305C (en) 2000-06-27

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