Voice Scrambling/Encryption - Icom IC-F9511T User Manual

■Voice scrambling function ■Voice scrambling function
The optional voice scrambler unit provides high performance private communication between stations with
the same scrambler code. The IC-F9510 series has a built-in inversion type voice scrambler.
(Analog mode only)
What is 'Inversion type voice scrambler' ?
The audio frequency band is inverted as below. The frequencies in each band are inverted. The divided
frequency is programmable with cloning.
Original AF
Level
300Hz
■Optional AES/DES encryption
The IC-F9510 series provides AES and/or DES encryption for secure conversation with the
optional UT-125 AES/DES encryption unit or UT-128 DES encryption unit. Versions certified
to FIPS 140-2 Level 1 for AES encryption are planned for future release.
UT-125
AES/DES
E Encryption Unit ti U it
The AES (Advanced Encryption Standard) is a block cipher adopted as an encryption standard by the Federal
Information Processing Standard (FIPS) for the United States in 2002.
AES is based upon the Rijndael algorithm. AES offers 256-bit encryption.
The DES (Data Encryption Standard) is a cipher selected as an official Federal Information Processing
Standard (FIPS) for the United States in 1976. DES was developed by IBM and was based upon IBM's earlier
Lucifer cipher. DES utilizes a 56-bit key. This key size is vulnerable to a brute force attack using current
technology. In recent years, the cipher has been superseded by the AES.
▒ NOTE : For details on how to activate AES/DES Encryption, please refer to the following page.
▒ The FIPS version will be available in the future. The FIPS (Federal Information Processing Standard) 140
▒ are U.S. Government security standards that specify requirements for encryption modules and defines four ▒
▒ levels of security, named Level 1 to Level 4.
4-6

Voice Scrambling/Encryption

4-6-1 Voice Scrambling/Encryption
Level
3kHz Frequency
UT-128
DES
Encryption Unit E ti U it
y p
Inverted AF
300Hz 3kHz Frequency
y q yp
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