Sds Encryption; Sds End-To-End Encryption - Motorola MTP850 S Product Information Manual

The radio supports SwMIs that employ store and forward service as indicated in the cell broadcast information. The
radio supports use of a service center, which address is set in the radio. The store and forward operation is supported.
However, the radio notifies you only on successful sending of the message. The radio does not wait for the report
from the service center.
Downlink SDS messages types 1, 2, and 3 are always routed to the PEI when an AT application is registered. If no
external application is registered, the message is discarded.
Note: The DMO SDS do not support type 1,2, and 3 user-defined short messages.

SDS Encryption

Short data messages stored in a radio are protected against any unauthorized access. The stored data includes
messages in the Inbox, Outbox, and stored call out messages.
The required protection against any unauthorized access through the MMI, PEI, or unintentional access by other
means is carried out through the special mechanisms. The encryption of stored messages preventing from accessing
the memory directly and the user authentication protect SDS messages. Protected messages cannot be read on the
radio MMI unless valid authentication occurs. For the user authentication, the existing radio PIN is used.
SDS messages received by the radio are encrypted before being stored in the Inbox. Store and Forward messages are
encrypted before being saved in the Outbox.
Received call out messages are encrypted before being stored in the CO Box.
If the feature is enabled, then the radio prompts you to enter the PIN if any of the following menu items are selected
from the MMI.
• Messages → Inbox.
• Messages → Outbox.
• Messages → CO Box.
Following successful PIN entry and access to the required messages, the radio does not require further PIN entries to
access messages unless one of the following conditions has been met.
• Exiting from the radio menu.
• Turning off the radio.
• Changing the PIN from the MMI.
If you disable the PIN lock through the MMI or change the PIN, the protected messages are deleted. Before deleting
the messages, you are prompted to ensure that the operation should proceed. If the PIN lock is changed through the
PEI, all the protected messages stored in the Inbox, Outbox, and CO Box are deleted. On enabling the radio
permanent disable, the access to the protected messages is lost.

SDS End-to-End Encryption

The TETRA standard supports the air interface security that provides protection of the air interface. The information
flow inside the infrastructure is not secured. When you require data protection for your data going through the
infrastructure, you need your entire transport path to be encrypted.
This entire path encryption is called end-to-end encryption (E2EE). The source and the destinations are supplied with
the mechanism for encrypting and decrypting.
E2EE is a selling feature which provides customers with a higher degree of confidentiality than existing TETRA air
interface data encryption.
Note: The 260–275 MHz radios do not support the SDS end-to-end encryption.
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