Polycom RealPresence Group Series Documentation page 53

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Note

To avoid security risks, Polycom recommends that all participants communicate the state

of their padlock icons verbally at the beginning of a call.

Related Topics

Settings

Verify Encryption Check Code

To provide extra security for encrypted H.323 calls, the system provides an encryption check code.

Participants in a call can use this check code to verify that the call is not being intercepted by a third

party. Polycom recommends verifying check codes at each site to protect against third-party

eavesdropping on H.323 point-to-point calls. The check code is calculated so that the check code is

the same at both sites in the call. The numbers are identical if, and only if, the calculation uses data

exclusively from the two sites in the call, with no data being intercepted and modified by a third party.

Note that in externally-hosted multipoint calls, check code numbers do not match any other numbers in

the call.

Procedure

1 Place an encrypted H.323 point-to-point call.

2 Press

on your remote control, then navigate to

Statistics.

3 On the Call screen, select Call Statistics.

4 For Call Encryption, locate the check code, as shown in the following example: AES-128/TLS/

SDED

5 Verbally verify that the check code is the same at both sites.

6 Do one of the following:

•

If the codes match, the call is secure. Proceed with the call.

•

If the codes do not match, the call might be compromised. Hang up the call and contact

your system administrator.