‘How to protect against SIM swap hacks?’

'How to protect against SIM swap hacks?'

The Rise of SIM Swap Hacks and the Importance of Identity Security in the Blockchain Industry

In today’s digital age, where cybersecurity infrastructure continues to evolve, online identities still face numerous risks. One such risk is the increasing occurrence of SIM swap attacks, which have the potential to compromise sensitive information and gain unauthorized access to bank accounts, credit cards, and even cryptocurrency wallets.

What is a SIM swap hack and how prevalent is it?

A SIM swap hack is a form of identity theft where attackers take over a victim’s phone number, enabling them to bypass two-factor authentication (2FA) measures and gain control of various accounts. This type of attack has been on the rise in recent years, with the Federal Bureau of Investigation receiving over 1,600 complaints in 2021 alone, resulting in losses exceeding $68 million. This represents a staggering 400% increase compared to the previous three years.

According to Hugh Brooks, the director of security operations at CertiK, this upward trend demonstrates the urgent need to address the vulnerabilities associated with SMS-based 2FA. If telecommunications providers do not enhance their security standards, SIM swap attacks are likely to continue proliferating and causing significant financial losses.

The ease of performing a SIM swap hack

Contrary to popular belief, executing a SIM swap hack does not require advanced technical skills. In many cases, attackers can gather the necessary information through publicly available sources or by using social engineering techniques. This makes SIM swapping a relatively low-barrier method for hackers, especially when compared to more complex attacks like smart contract exploits or exchange hacks.

23pds, the chief information security officer of SlowMist, highlights that SIM swap attacks have been prevalent in the Web2 world and are now emerging in the Web3 environment as well. The growing popularity of Web3 and the increased number of individuals entering the blockchain industry make SIM swap attacks more likely due to their relatively lower technical requirements.

Preventing SIM swap hacks

Given the ease with which SIM swap attacks can be executed, it is crucial for users to prioritize their identity security. Restricting the use of SIM card-based methods for 2FA verification is a core protection measure. Instead, individuals should opt for more secure options like Google Authenticator or Authy. These apps generate unique codes that cannot be intercepted by attackers.

Implementing multi-factor authentication and enhancing account verification with additional passwords are additional strategies recommended by 23pds. Users should also establish strong PINs or passwords for their SIM cards or mobile phone accounts. Protecting personal data, such as name, address, phone number, and date of birth, is essential to prevent attackers from obtaining the information necessary for a SIM swap attack.

Platform providers also have a responsibility to promote safe 2FA practices. They can achieve this by implementing additional verification steps before allowing changes to account information and educating users about the risks associated with SIM swapping.


SIM swap attacks pose a significant threat to online identities and have become a growing concern in the blockchain industry. The increasing number of reported cases and financial losses highlight the urgency for individuals and platform providers to prioritize identity security. By adopting more secure 2FA methods and implementing additional protective measures, users can significantly reduce the risk of falling victim to SIM swap hacks. As the blockchain industry continues to evolve, it is crucial to stay vigilant and proactive in safeguarding personal information and accounts from such attacks.

This article was originally written by the author and edited by Cointelegraph editor Felix Ng.