name: SFR
full_form: Security Functional Requirements
context: PP will never describe an implementation, but a PP author may want to give more or less freedom to the implementation of the security functionality. An ST may also extend the requirements beyond the requirements in the PP. The CC provides a catalogue of Security Functional Requirements (SFRs) and the Security Assurance Requirements (SARs) in CC Part 2 and Part 3. The PP and ST writers may use these catalogues to select the requirements for the PP and ST, but may also define their own. However, it is not only very useful to rely on the catalogue of SFRs since readers of STs will be familiar with these SFRs. The CC also requires that new SFR should only be introduced if the available SFR from CC Part 2 are not sufficient. There is also much experience and know-how that has gone into these requirements. Still it is up the ST and PP writer to select and instantiate (complete) the SFRs that are provided in CC Part 2. Since both the PP and the ST are formal documents there are several
description: Security Functional Requirements (SFRs) are a set of standardized requirements for security functionalities within telecommunications. Defined by the Common Criteria in Part 2, they serve as a catalogue for developers to select from when defining their own security requirements.
explanation: The text describes SFRs as 'standardized requirements for security functionalities' and mentions their use in defining security requirements for telecommunications systems. This clearly classifies them as Security Requirements.
section_title: 5.1.1.6	Concept of ST and PP
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