Historical info on the GSP 8191

Please note that GSP 8191 is no longer available. These specs are provided for historical information only. Enjoy.

Specifications:

• Modem
• ITU V.32bis (14,400 bits/sec)
• Interfaces
• Two buttons (Go Secure, Go Clear)
• Graphic LCD
• Red/Green LED
• External power supply (12-18 VDC, 700 mA)
• Two RJ11 modular phone jacks (Phone, Line)
• Power
• Input Voltage: 110 volts AC, 50-60 Hz
• Approvals
• FCC, part 15 and 68
• Industry Canada CS-03
• Warranty
• 12 month parts and labor
• Software Upgrades
• One year of upgrades included in purchase price
• Voice Modes
• Clear voice
• Secure voice
• Secure Mode Speech Compression
• International standard GSM 06.10 full rate speech transcoding (13,000 bits/sec)

Notes:

• Specifications subject to change without notice.
• Government regulations apply for export license
• Completing the circle of secure communication requires the receiving end of your call to also have a GSP8191 unit connected to their phone.

Cryptographic Overview:

• Unique session key generated for each conversation using Diffie-Hellman exponential key exchange (2048 bit modulus) (U.S. Patent No. 4,200,770 licensed by Cylink Corporation)
• Defense against "man in the middle" active attack using interleave protocol combined with voice verification of six digit key name derived from the public exponentials.
• Hardware Random number generator based on Johnson (thermal) noise.
• Three Key Triple-DES (168-bit key), operating in modified counter mode.
• No "Back Door", "Key Escrow" or "Key Recovery".
• Open standard. Full protocol details available in PDF format.