SMS
While SMS is a convenient communication method, it’s also one of the least secure. SMS messages can be intercepted, and they often contain sensitive information.
SMS Encryption
Consider using encrypted messaging apps instead of traditional SMS for sensitive communications. Apps like Signal and WhatsApp offer end-to-end encryption, ensuring that only you and the recipient can read the messages. These apps also provide additional security features like disappearing messages and screen security.
Two-Factor Authentication
Avoid using SMS for two-factor authentication (2FA) when possible, as it’s vulnerable to SIM swapping attacks. Instead, use app-based 2FA methods like Google Authenticator or Authy, which generate time-based one-time passwords (TOTPs) that are more secure than SMS codes.
Message Retention
Regularly delete old SMS messages, especially those containing sensitive information. Keeping old messages on your device increases the risk of exposure if your phone is lost or compromised. Most messaging apps have options to automatically delete messages after a certain period.
Spam Protection
Enable spam filtering on your phone to reduce the risk of receiving malicious messages. Be cautious about responding to unknown numbers, as this can confirm your number to spammers and lead to more unwanted messages.
Rich Communication Services (RCS)
Rich Communication Services (RCS) is a modern messaging protocol that provides enhanced features like read receipts, typing indicators, and group chats. It’s supported by many modern messaging apps and carriers.
Alternatives
Action Items
- Review SMS security settings
- Delete old, unnecessary messages
- Enable spam filtering
- Consider using encrypted messaging apps
- Review 2FA methods and switch from SMS where possible