On an iOS device with iMessage enabled, it’s possible to filter out any iMessages from senders who aren’t in your Contacts. Simply go to Settings -> Messages and enable “Filter Unknown Senders.” This can reduce the risk of phishing and harassment.

Internet-based chat apps are generally safer than plain SMS (text) messages, but they’re not necessarily bulletproof. An exploit in WhatsApp, allowing malware injection, showed that even apps touting “end-to-end encryption” sometimes have vulnerabilities. To stay safe, apply any updates as soon as possible or – for particularly sensitive conversations – take them offline or use […]

Do you use Gmail? If so, it’s probably a good idea to set up two-factor authentication to ensure that even a stolen password isn’t enough for someone to break in. You can use SMS (text message) or, preferably, more secure methods like the Gmail mobile app to confirm each new login attempt.

It’s possible to log in to Facebook with your phone number and to send SMS messages via Facebook Messenger. However, there’s some risk involved, as your number might be sold to marketers or be used by strangers to look up your profile without even knowing your name. Stick with your email address if possible.

If you use two-factor authentication, it’s best to rely on codes sent to other devices or applications such as Duo or Google Authenticator instead of SMS texts. That’s because SIM hacking is on the rise. This practice entails a cyberattacker tricking a customer service representative into reassigning a phone number to a new SIM card.