ACP 137

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ACP 137
Griffin DS at this time, but this paragraph has been included as a placeholder for its future
incorporation, in parallel with it being defined within ACP 133.
INTRODUCTION
GRIFFIN MESSAGING SERVICE REQUIREMENTS
317. The Griffin DS itself also requires the use of an underlying transport service over
which directory information to be replicated may be transferred. Both underlying transport
services, the High Grade, MM service and the informal email service could be used. The
preference is to use the MM service, when available, thus ensuring information is digitally
signed and better protected. The exchange of addressing information is heavily based on the
architectures adopted by nations to implement their internal and boundary solutions, as
discussed below.
MILITARY MESSAGING SERVICE
318. The Griffin MM Service is based on the transport of X.400 messages across the
Griffin network via ACP 145 messaging gateways provided at the boundary of each nation.
How the service is provided behind the ACP 145 gateway is a national matter, as is the choice
of gateway within a nation (if more than one exists) and the choice of security domain used to
deliver the message (as long as it does not contravene security rules).
319. The Griffin DS requires that the MM service supports the following capabilities:
a. Transfer of text attachments.
b. Ability for the originator to specify security labelling information in both the
message heading and the First Line of Text of the Message text area, to allow the
Classification and Releasability requirements for the message to be specified.
c. Messages signed at the gateway on behalf of the nation.
d. Choice of an appropriate path dependent upon the security classification which
was assigned to the message before it was sent.
e. Message delivery to the specified destination mailbox.
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