Security Assurance Methodology

Description

The Security Assurance Methodology (SECAM) is a comprehensive framework defined across multiple 3GPP technical specifications (including TS 33.117, 33.805, 33.916, and 33.926) that establishes standardized approaches for security evaluation, testing, and assurance of 3GPP network products and implementations. It provides methodologies to verify that security features are correctly implemented and effective against identified threats. SECAM encompasses security assurance specifications (SCAS) for different network elements, which detail security functional requirements and assurance activities specific to each product type, such as base stations, core network nodes, or user equipment.

SECAM works by defining a structured process that begins with the creation of Security Assurance Specifications (SCAS) for particular 3GPP network elements or functions. These specifications identify security objectives, threats, and required security functions based on the element's role in the network architecture. The methodology then outlines assurance activities—including documentation review, vulnerability analysis, penetration testing, and functional security testing—that must be performed to verify compliance. Testing laboratories or certification bodies execute these activities according to standardized test plans, evaluating both the implementation of security mechanisms and their resilience against attacks. Results are documented in security evaluation reports that form the basis for certification decisions.

Key components of SECAM include the Security Assurance Specification (SCAS) documents that define requirements per network element, the Security Assurance Levels (SAL) that indicate the depth and rigor of evaluation required, standardized test cases and methodologies for security testing, and the certification framework that defines roles of manufacturers, testing laboratories, and certification authorities. The methodology covers various security aspects including cryptographic algorithm implementation, secure boot, access control, log management, and resistance to protocol attacks. SECAM's role in the network is to provide confidence that deployed network equipment has undergone rigorous, standardized security evaluation, reducing the risk of vulnerabilities that could compromise network integrity, user privacy, or service availability.

Purpose & Motivation

SECAM was created to address the growing need for standardized security evaluation of 3GPP network products in an increasingly complex threat landscape. As mobile networks evolved to support critical services and handle sensitive data, vulnerabilities in network equipment could have severe consequences. Prior to SECAM, security testing approaches varied between manufacturers and operators, making it difficult to consistently assess security posture or compare products from different vendors. This inconsistency created potential security gaps and increased the risk of deploying equipment with unknown vulnerabilities.

The methodology solves the problem of inconsistent security evaluation by providing a unified framework that defines what security requirements apply to each type of network element and how those requirements should be tested. It addresses the challenge of ensuring that security features are not just present but correctly implemented and effective against real-world attacks. SECAM enables network operators to make informed procurement decisions based on standardized security certifications, and gives regulators a consistent basis for approving equipment for use in national networks.

Historically, as networks transitioned to all-IP architectures with increased software-defined components and exposure to internet-based threats, the attack surface expanded significantly. SECAM provided the necessary methodology to systematically evaluate security across this expanded threat landscape. It also supports the security assurance needs of emerging technologies like 5G network slicing, edge computing, and massive IoT deployments, where traditional perimeter-based security models are insufficient and each network function requires individual security validation.