User's Manual

ENCRYPTION

CES-128 VOICE ENCRYPTION

ENVOY™ TRANSCEIVER REFERENCE MANUAL 293

Related links:

Secure mode on page 293

PIN for secure session on page 295

Standby mode on page 297

Base key on page 301

Enabling the use of a PIN for a secure session on page 295

Enabling access to secure standby on page 298

Enabling clear transmissions during secure standby on page 299

Switching the encryptor on or off on page 101

CES Options on page 238

Secure mode

CES-128 encryption may operate in one of two modes: Corporate or Global. You can

set the secure mode in Settings > Security > CES-128 Mode.

For secure communications within your organisation you must set up secure keys in

the Corporate secure indexes. These must be common to all transceivers in your

organisation. Corporate secure mode refers to a secure session that uses a key stored

in one of the Corporate secure indexes, and the Base key, as the seed for the encryption

algorithm. The CES-128 voice encryptor can store a secure key in up to 98 Corporate

secure indexes. Each key may contain up to 16 digits, except the first key, which

accepts only 8 digits.

If you need to have secure communications with other organisations operating the

same type of equipment as yours, you can use the fixed Global secure key that is

common to all CES-128 voice encryptors shipped from Codan. The Global secure key

provides secure communications, however, the security is less than that provided by

a secure key in a Corporate secure index. The PIN facility may also be used with the

Global secure key to increase the level of security.

NOTE: The Global secure key does not use the Base secure key in its

encryption algorithm.