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Encrypting the flash memory on your phone blocks such an attack by scrambling your data so that it can only be unlocked using the same pattern, PIN, or password used to unlock your phone. A screen lock is not much use if a thief can copy your phone’s data to a different device. Don’t tell anyone how to unlock your phone unless you’re OK with them reading all of your encrypted messages. You can do this from the Settings app under Security > “Screen lock.” Try to make it random, and avoid using anything obvious such as birthdates.

Set up screen lock, which requires you to draw a pattern, type a numeric PIN, or type a password to unlock your phone.Signal uses strong end-to-end encryption, which, when properly used, ensures that no one involved in facilitating your conversation can see what you’re saying - not the makers of Signal, not your cellphone or broadband provider, and not the NSA or another spy agency that collects internet traffic in bulk.īut Signal’s encryption scheme can’t stop someone from picking up your phone and opening the app to read through your conversations. Verify that you’re talking to the right person.Hide Signal messages on your lock screen.If you wish to jump ahead to a specific section, you can click the appropriate link: I discuss these steps at length below, in order of importance. You can download Signal from the Android Play Store and the iPhone App Store.Īlthough Signal is well-designed, there are extra steps you must take if you want to maximize the security for your most sensitive conversations - the ones that could be misinterpreted by an employer, client, or airport security screener might be of interest to a snooping government, whether at home or abroad or could allow a thief or hacker to blackmail you or steal your identity. It also has open source code, meaning it can be inspected to verify security.

Signal is easy to use, works on both iOS and Android, and encrypts communications so that only the sender and recipient can decipher them. There are dozens of messaging apps for iPhone and Android, but one in particular continues to stand out in the crowd. Check here for more recent information about Signal.