Installation & Operation Manual
350
Document # LTRT-92224
Mediant 8000
33.13
Media Security
The Mediant 8000 Media Gateway supports two different types of Media Security:
Packet Cable Security
Secure RTP
33.13.1
Packet Cable Security
The Mediant 8000 supports media encryption via TGCP (Packet cable extension of
the MGCP protocol). IP voice traffic for some or all channels is encrypted using
predefined session keys. No key negotiation is performed for media security. Instead,
key management is handled by higher-level protocols (TGCP).
Packet Cable Security specifications:
AES (Rijndael) cipher algorithm, in CBC mode
Key strength – 128 bit
Encryption key supplied by TGCP
Packet Cable Security is enabled by default when TGCP call control is configured by
setting
Call Control
Compatibility Profile
to
32
(in the Media Gateway Controller
configuration screen) and
DSP Load File Version
to
3
(in Media Gateway board
Media Settings configuration screen).
33.13.2
Secure RTP
Secure RTP, a standard protocol defined by RFC 3711, provides confidentiality,
message authentication and replay protection of the RTP & RTCP traffic. Key
negotiation is not part of the SRTP. Instead, it is handled by a higher-level protocols
(MGCP and MEGACO).
Secure RTP specifications:
Encryption – AES 128 in Counter Mode or 128 or 192 ARIA (Korean standard) for
Media Security
Authentication – HMAC-SHA1
Support of Key Derivation
Key management is provided via MGCP and MEGACO
Note:
See the version-specific Release Notes to check the availability of the SRTP
application in a specific Media Gateway software release.
Summary of Contents for Mediant 8000
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Page 33: ...Part I Hardware Overview This part describes the hardware overview of the Mediant 8000 chassis...
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Page 775: ...Part VI Maintenance This part describes the Mediant 8000 maintenance procedures...
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Page 879: ...Part VIII Appendices This part describes additional Mediant 8000 configuration procedures...
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Page 924: ...Media Gateway Mediant 8000 www audiocodes com Installation Operation Maintenance Manual...