Page 8 - Security Today, May/June 2023

Protecting Sensitive Data By Thorsten Stremlau Digital banking has become commonplace across the world, with the number of people using these services projected to reach 3.6 billion by 2024. Ensuring the protection of systems and sensitive data can be a complex task for banks and other organizations to manage, as they are unable to directly implement security measures onto a customer’s personal device. Instead, they must rely on the general cybersecurity ecosystem, and the institutions establishing trusted computing within it. THE DIGITIZATION OF BANKING The COVID-19 crisis has had a lasting effect on consumer banking behavior. With the temporary closure of around 8,500 branches in the UK alone, the pandemic compelled banks and their customers to use digital tools and processes instead of tra- ditional banking services. The rapid digital transformation of these services proved to be the most pertinent banking trend of 2022 and fueled a massive increase in the number of connected devices and suppliers linking to customer’s bank accounts. With the growth of this digital supply chain comes an in- creased number of significant threats. These can prove ruinous to organizations if the key cybersecurity elements involved within the ecosystem are not held to well-established, internationally recognized standards of trust. In June 2022, it was reported that one of the largest financial institutions in the United States, Flagstar Bank, suffered a major data breach which resulted in almost 1.5 million customers hav- ing their sensitive information leaked. This included their social security numbers, banking information and personal details, such as their names, addresses, and birthdays. To avoid similar incidents, such as the 2013 attack against Tar- get, financial institutions and organizations in other industries. They must be able to rely on the readily available standards and specifications designed to protect personal devices, and by exten- sion, the banking applications found on them. THREATS TO THE SUPPLY CHAIN Often organizations are good at protecting “the front door,” with systems and protocols in place to protect their own servers against direct attacks. However, these become effectively useless if customer devices that link to financial services are not up to the same standards. Threats against personal devices are just as dangerous to financial institutions as they are to the user, as a successful exploit can quickly enable attackers to gain access to banking networks through the applications found on a device. Attackers no longer hack devices simply as a hobby. Malicious organizations now exploit vulnerabilities as a service, and they will often target supply chains with malware and ransomware attacks with the aim of stealing valuable data. Devices can be breached through a compromised third-party vendor anywhere in a net- work, with malicious parties using the organization to circumvent security controls and create avenues to sensitive resources. This is made possible by entities within the chain who simply do not take cybersecurity as seriously as others. To successfully mitigate any vulnerabilities, each phase of a product’s lifecycle – whether design, manufacturing, transport, utilization, or decom- mission – need assessing to uncover any significant risks. Unfortunately, this is not easily achieved, with no single entity having complete control of a supply chain. Organizations must work together to ensure that security standards for the industry are correctly defined, implemented, and adhere to up-to-date se- curity guidance measures. Third-party risk assessments on a regular basis – especially when there are changes to a bank’s digital infrastructure – can ensure the cybersecurity measures of any vendor are aligned with those leveraged by financial institutions. THE NECESSITY FOR UP-TO-DATE SPECIFICATIONS Organizations like the Trusted Computing Group (TCG) are ded- icated to developing standards and specifications that make cyber resilience accessible to the average user and provide assurance to organizations that their systems are protected, whether in finance or any other industry. The ongoing work developed by standards organizations helps create strong frameworks by which devices within a supply chain must demonstrate compliance to, which of- fers additional protection against cyber threats. The Cyber Resilient Technology (CyRes) specification devel- oped by the TCG, entitled Cyber Resilient Module and Building Block Requirements is an example of a crucial standard making a difference within the technology ecosystem. This specification was created to ensure the implementation of cyber resilient archi- tecture in the first stages of a product’s design process, rather than it being considered an afterthought. The goal is to sufficiently equip all devices with the necessary components to protect, detect, and attest – bolstering the security of the supply chain. This, paired with a hardware Root of Trust (RoT) like the Trusted Computing Module (TPM), makes cyber resiliency ac- cessible to the average user and provides assurance to financial organizations that their systems are protected. The financial sector remains a major target for malicious cy- ber-attacks, facing the second-largest number of known security breaches in 2022. Banks differ from many other large organiza- tions in that they must heavily rely on the security of their cus- tomers’ devices. They must trust that the overall security ecosystem is secure enough to prevent or mitigate any damage caused by cyber-attacks. Stringent security measures and software must be made readily available and common within devices to ensure banks and other organizations are adequately covered against threats. The standards and specifications from bodies such as TCG are necessary to protect against malicious activity, and establish trusted computing. Thorsten Stremlau is a senior engineering staff member and CTO within Lenovo’s Intelligent Devices Group PC & Smart Devices business. He also is a member of the Trusted Computing Group. 8 MAY/JUNE 2023 | SECURITY TODAY CYBER SECURITY