- SMS regained focus as a key tool in digital security and a popular choice for two-factor authentication (2FA) in April 2022.
- Weaknesses of SMS-based 2FA include vulnerabilities to SIM swapping, SMS interception, and social engineering, highlighting the need to use it alongside other security measures.
What happened
The focus has returned to SMS, a technology once thought outdated, as it plays a vital role in digital security, particularly in April 2022. While once used for basic text communication, SMS has become a popular method for implementing two-factor authentication (2FA). With its compatibility across devices, ease of use, and reliability in low-connectivity areas, SMS offers a practical solution for adding an extra layer of security. However, SMS-based 2FA has weaknesses. Attacks like SIM swapping, SMS interception, and social engineering reveal its vulnerabilities. For instance, the attack on Twitter co-founder Jack Dorsey underscores the risks of relying solely on SMS for protection.
While SMS-based 2FA is not as secure as authenticator apps or physical keys, it remains better than using only passwords. As an accessible option for many, SMS provides an extra layer of protection, especially in environments where advanced methods aren’t feasible. It should be part of a broader security strategy rather than the sole defence. In the evolving world of cyber threats, every additional layer of security matters—and SMS still has a role to play.
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Why it is important
SMS is making a comeback in digital security, especially as a method for two-factor authentication (2FA). Though once seen as outdated, SMS’s simplicity and compatibility across devices give it a practical edge. It works well even in areas with low connectivity, making it a widely accessible security tool.
However, it has vulnerabilities. SIM swapping, SMS interception, and social engineering attacks expose its weaknesses. The attack on Jack Dorsey’s Twitter account showed the risks of relying only on SMS.
Yet, SMS-based 2FA still offers better protection than passwords alone. It is easy to use and available to many people, especially where advanced security options aren’t feasible. The key is to use SMS as part of a broader strategy, not as the only defence. In the face of evolving cyber threats, every added layer of security counts, and SMS still plays a meaningful role.
