My ETSI TS 103 120 Notes

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My notes on ETSI TS 103 120 document titled Lawful Interception (LI); Interface for warrant information.

103 120 Scope

ETSI TS 103 120 document defines an electronic interface between two systems for the exchange of information relating to the establishment and management of lawful required action, typically Lawful Interception. Typically this interface would be used between: on one side, a Communications Service Provider; and, on the other side, a Government or Law Enforcement Agency who is entitled to request a lawful action.

The ETSI reference model for LI (ETSI TS 102 232-1) defines three interfaces between law enforcement and CSPs, called HI-1, HI-2 and HI-3. The protocol defined in 103 120 document is designed to provide a large part of the functionality for HI-1. It is not designed to be used for HI-2 (delivery of intercept related information) or HI-3 (delivery of communications content). The protocol designed in 103 120 document may also be used for interfaces which require structured exchange of information relating to the establishment and management of Lawful Interception. The general view is that the HI-1 concept can also be used for other legal actions than LI. For that reason the present document could, besides LI, also be applied for retained data requests, seized data requests, data preservation orders and other similar legal requests

See specification for full details.

8.3 LDTaskObject

8.3.1 Overview

An Lawful Disclosure Task Object (LDTaskObject) represents the state of an LD Task - that is, the act of disclosing information. This corresponds to the WarrantTargetID and WarrantTechSpec elements defined in ETSI TR 103 690. In general, multiple tasks may be authorised by a single warrant.

The LDTaskObject consists of the following fields.

LDTaskObject

Field	Format	Description	Reference
Reference	LDID (see ETSI TS 103 280)	LDID assigned to the product of task.	Clause 8.3.2
Status	LDTaskStatus Dictionary Entry.	The current status of the task as determined by the Receiver.	Clause 8.3.3
StatusReason	ActionUnsuccessful structure (see clause 6.4.9).	Optional information for the Receiver to indicate why the Object is in a certain state (such as Invalid or Rejected). Usage for national agreement.	Clause 6.4.9
DesiredStatus	LDTaskDesiredStatus Dictionary Entry.	The current status of the task as specified by the Sender.	Clause 8.3.4
RequestDetails	LDRequestDetails (see clause 8.3.5).	Details regarding the content of the disclosure request, such as identifiers and dates.	Clause 8.3.5
DeliveryDetails	List of LDDeliveryDestination structures (see clause 8.3.6).	Destination(s) for the disclosure product.	Clause 8.3.6
ApprovalDetails	ApprovalDetails (see annex E).	Details regarding the approval for this Task, including dates and signatures where appropriate.	Clause 8.2.9
CSPID	EndpointID (see clause 6.2.4).	Describes the CSP required to implement the Task.	Clause 8.2.10
HandlingProfile	LDHandlingProfile (see clause 8.2.11).	A dictionary entry which gives the name of a handling profile that represents a set of configuration information associated with this task.	Clause 8.2.11
Flags	LDTaskFlags (see clause 8.3.7).	A set of flags associated with the Task Object.	Clause 8.3.7
NationalLDTaskingParameters	See annex G.	See annex G.	Annex G

8.3.2 Reference

The Reference field gives a reference identifier for the Task, for correlation with other processes. For LD, this shall be set to the LDID that will be assigned to the product of the disclosure. Format will be as per ETSI TS 103 280.

8.3.3 Status

The Status field gives the status of the LDTaskObject as determined by the Receiver. A Sender shall not attempt to set the Status as part of a CREATE or UPDATE Request, and a Receiver shall return an Action Unsuccessful Information Response if the Sender attempts to do so.

The Status field provides a key mechanism for mapping the content of the Object to the relevant nationally-defined processes. The rules for evaluating the correct value of the Status field shall be defined in the relevant national profile.

Given as a LDTaskStatus Dictionary Entry. The LDTaskStatus Dictionary is defined in table 8.16 (see annex F for more details on Dictionaries).

LDTaskStatus Dictionary

Dictionary Owner	Dictionary Name
ETSI	LDTaskStatus.

Defined DictionaryEntries

Value	Meaning
AwaitingApproval	he Task is still waiting approval from one or more relevant authorities.
AwaitingDisclosure	The Task is approved, but is not yet processed by the LD system.
Disclosed	The Task has been processed and the product has been disclosed by the LD system.
DisclosureNotAvailable	The Task has been processed and the CSP has determined there is no product available to disclosure.
Rejected	The Task has been explicitly denied or rejected by one or more relevant authorities.
Cancelled	The Task has been permanently cancelled.
Error	The Task has not been processed due to a problem with the underlying LD system.
Invalid	The Task has not been processed to a problem with the current information populated in the Task Object.

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