ACP 201

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ACP 201
that, in the case of chat messages, confirmation of receipt of the order / coordination / directions is
recorded as an official ―Record of Decisions and Orders‖ promulgated during the chat session.
ELEMENTS OF SERVICE
123. As a consequence of the staged delivery nature of modern electronic messaging systems,
there may not be any direct, real-time association between an originator and a recipient. Therefore,
many of the functions required to maintain confidentiality, and verify origin and receipt must be
performed independently by the originator and by the recipient, based on their respective
information. Future messaging systems include certain security features that are applied directly to
the message content. These Elements of Service (EoS) include the following:
a. Authentication. Authentication includes measures designed to provide protection
against fraudulent transmission and imitative communication deception by
establishing the validity of a transmission or message. Should a Commander
require verification of the authenticity of orders received via email or chat, existing
authentication procedures laid down in ATP 1 and other tactical publications may
be used.
b. Confidentiality. This function enables an originator to ensure the confidentiality of
the content of the message, and assures the recipient that the message content
received is identical to that which was sent.
c. Integrity. Integrity assures the originator that the sent message cannot be modified
without the recipient detecting the modification.
d. Non-Repudiation, for both originator and recipient. This function provides the
recipient with evidence of the identity of the originator, and protects against any
attempt by the originator to falsely deny having sent the message. Likewise it
provides the originator with evidence of the identity of the recipient, and protects
against any attempt by the recipient to falsely deny having received the message.
FUNCTIONAL (ROLE BASED) ACCOUNTS
124. Wherever possible, user accounts utilized for the sending and receiving of tactical
messages must be role based. All TF/TG units are to maintain a continuous guard on all watch
standing or watch keeping accounts utilized for the sending and receiving of tactical messages,
including chat and e-mail. A list of common watch standing positions is contained in Annex B to
Chapter 2.
MANAGING NETWORK OVERHEADS
125. In an emergency, or during operations when the communications capacity of the network
is overloaded, it will be necessary to manage TCP/IP traffic to ensure prompt handling of vital
information. ACP 121 specifies the policy and procedures to be followed in order to reduce
traffic, and the OPTASK IM details the Commander‘s specific requirements in the event of it
becoming necessary to implement MINIMIZE procedures on the MTWAN. The order
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