Today’s telecommunication networks are complex, heterogeneous mix of varied technologies and equipment deployed over the years. This has been driven by business requirements to scale up and cater to the growing demands from the industry. Security has been traditionally perceived as a cost center, and hence, has not been integrated into this complex architecture of telecommunication networks. However, the long term implications of not securing the infrastructure could be huge.
Key Drivers for Security in Telecommunication Networks
Telecommunications networks are increasingly being targeted by motivated attackers looking to disrupt, deny or intercept communications. These attacks may be the act of individual hackers, hacker organizations, organized crime syndicates or even state-sponsored agencies.
Telecommunication networks are viewed as part of the critical national infrastructure globally. There is a growing apprehension among governments on the possibility of serious attacks on this critical infrastructure by hostile state / non-state actors. Concerns on this front include data leakage of individual and state apparatus, and the misuse of this information to cause disruption of the communications systems.
Several countries have developed laws and regulations that govern telecommunication networks that mandate the telecom organizations to ensure security of their infrastructure and services. Any failure of telecommunication organizations to secure their infrastructure can lead to financial and reputational losses resulting from loss of customer confidence, legal actions and fines from regulatory bodies.
Threats to Telecommunication Networks
Some of the major threats to today’s telecommunication networks include the following:
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Zero-day attacks that exploit previously unknown vulnerabilities
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Illegal interception of traffic by the use of modified base stations, exploiting weaknesses in signaling systems or misuse of lawful interception mechanisms
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Physical attacks on critical infrastructure components like switching centers
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Unauthorized access to and modification of personal and confidential data by compromising network databases using masquerading, social engineering, malware and other techniques
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Attacks on self or competitor networks by the use of malicious components
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Supply chain contamination of telecom equipment being imported from other countries
The Need for an Information Security Program
Several security products are available in the market, today, that target specific areas of enterprise security. An enterprise is likely to have a number of such security products deployed. To be effective, these need to be integrated and managed, supported by strong policies and processes.
An Information Security Management System (ISMS) provides a framework for defining security policies and procedures. The ISMS should be risk-based, aligned to business goals of the telecommunication organization, and based on industry standards like ISO 27001 and best practices. Establishing and adhering to this strong security framework will ensure that security is integrated into future business decisions that affect the infrastructure.
Security Testing: Addressing the Evolving Threat Environment
The threat environment is ever-evolving with new vulnerabilities being discovered in systems on a frequent basis and attacks exploiting these. Security testing of the telecommunication networks is the key to understand the exposure of the network to such threats and mitigate the risks. The security tests must cover telecom equipment software, firmware and hardware, IT and telecom network components, and radio access network and should be performed periodically. These tests should include vendor equipment assessments, vulnerability assessments, penetration tests and assessment for unknown vulnerabilities.
In this white paper, we discuss why telecommunication organizations should adopt a multi-faceted, holistic approach to managing security, aligned to business goals and endorsed by senior management.
Read White Paper: Telecommunication Networks: Security Management