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Technical Communications Corporation - this page is a stub

Technical Communications Corporation, commonly abbreviated TCC, is an American company and manufacturer of military-grade secure communications systems and customised solutions, for voice, data and video information on a range of networks. The company was founded in 1961 in Concord (Massachusetts, USA) – where it still is today – and became a public company in 1970.

TCC corporate logo. Copyright TCC [1].

TCC was an early player in the field of voice scramblers, and holds no less that 17 patents in the field of secure communications. Furthermore, the company claims to have developed 17 crypto­graphic algorithms [1]. In 1995, TCC acquired the assets of the American crypto firm Datotek from its (then) owner AT&T. Also in 1995, TCC entered into a distribution agreement with AT&T to sell their encryption products, such as the CSD-3600 and the CSD-4100. They continued this product line when AT&T left the secure telephone market.

TCC equipment on this website
DSP-9000 EDT voice scrambler
Telephone encryptor
Secure Telephone
Known products
  • DSP-9000
    Base station EDT voice scrambler
  • DSP-9000-HS
    Handset EDT voice scrambler
  • DSP-9000
    Implant board EDT voice scrambler
  • HSE-6000
    Radio headset and telephone encryption system
  • CSD-3324-SE
    Secure telephone (voice, fax, data)
  • CSD-3324-SP
    Secure telephone (AES) (FIPS 140-2)
  • CSD-3600
    Telephone encryptor (clipper chip)
  • CSD-3700
    Fax encryptor
  • CSD-4100
    Secure telephone
  • CipherTalk 8000 FP
    GSM FilpPhone
  • CipherX 7100
    Frame Relay Encryptor
  • CipherX 7200
    IP Encryptor (FIPS 140)
  • CipherOne
    VPN Suite
  • KeyNet
    Automated key and network management system
Known patents
  • 1971
    Privacy communications system
  • 1973
    Voice privacy device
  • 1980
    Voice privacy system with amplitude masking
  • 1981
    Secure communication system with improved frequency-hopping arrangement
  • 1983
    Secure facsimile transmission system using time-delay modulation
  • 1984
    Privacy communication system employing time/frequency transformation
  • 1998
    System for encoding encryption/decryption information into IFF challenges
Current address
  • Technical Communications Corp.
    100 Domino Drive
    MA 01742-2892

    Phone: +1 (0)978-287-5100
  1. TCC, A history of expertise, legacy of innovation (1961-2016)
    Retrieved December 2019.

  2. TCC, Annual Meeting of Shareholders 2020
    10 February 2020 (about fiscal year 2019).
Further information
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Crypto Museum. Created: Wednesday 25 December 2019. Last changed: Wednesday, 15 May 2024 - 08:59 CET.
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