![]() ![]() On top of that, the temporary and permanent keys are combined (along with more fancy algorithms) to create additional shared secret keys between the two people communicating. ![]() The temporary keys are regenerated on a per-message basis to limit how much information would be exposed should the keys ever leak. Signal’s protocol, for example, uses a combination of permanent and temporary keys. The encryption schemes for messaging apps are now much more advanced than the original public-private key scheme. You use your friend’s public key to encrypt a message, and when they receive the garbled text, they use their private key to unscramble it. Then when you respond to the encrypted message, the same thing happens in reverse. Once it’s garbled, the only way to read an encrypted message is to use the private key. A computer can then use this public key along with an encryption algorithm (fancy math!) to garble the message. The public key is something that everyone can see and know about. ![]() In their most basic form, these keys come in pairs: a public key and a private key. Encrypted messaging: It’s all about the keys Anton (CC0)Įncrypted messaging uses a tool called “keys”-essentially long strings of letters and numbers. This can include meeting locations with friends, controversial opinions, your health status, vacation plans, and maybe even a credit card number or account password. But if you look through your texts and emails, you’ll likely come across a lot of information that you wouldn’t want others to know about. It may not seem like you have anything critical to hide. ![]()
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