Sony DWM02/14 Product Information page 14

Technology
Encrypted Transmission
In an analog system, the frequency-modulated (FM) audio signal can be received by anyone with the right
equipment and some technical knowledge. By contrast, a digital system allows the use of encryption to make
the wireless transmission secure. The signals cannot be decoded by a conventional wideband receiver.
This makes it easy to maintain confidentiality for conference rooms, live performance venues and other
applications where strong measures against interception are required.
The Sony digital system offers the choice between a secure mode using encryption keys, and a password
mode where a secure group comprising multiple transmitters and receivers can be created.
Secure key mode
This is a one-on-one arrangement where the encryption key generated by the transmitter is used for a single
transmitter/receiver pair only. The mode provides highly secure strong encryption.
Password mode
A password that can be freely specified is set for a number of transmitters and receivers, and only
equipment using that password can communicate with each other. Connection to equipment without the
password set is blocked, resulting in secure operation.
Application example: broadcast station
All pieces of equipment used by the station are assigned the same password, allowing secure operation by
staff without having to worry about complicated setup procedures or information leaks. It is also possible to
broadcast audio from one transmitter to multiple receivers. Besides applications in the broadcasting sector,
this kind of system is also suitable for example for government and other public offices where information must
be transmitted securely.
Analog wireless system
Notes
 Encrypted transmission does not guarantee 100% confidentiality.
Changing the password on a regular basis is recommended.

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Key Features of WiDIF-HP
FM-modulated
audio signal
The risk of being intercepted by a
receiver of an outside system.
Digital wireless system
(WiDIF-HP)
Digitally modulated
coded audio
For confidential communication,
WiDIF-HP provides two
communication modes:
1) Secure key mode
2) Password mode