Elon Musk's X replaced its DMs with Chat, which is end-to-end encrypted but not by default. Users must set up a private-public key pair when they first use the feature and X says it uses "a combination of strong cryptographic schemes to encrypt every single message, link, and reaction that are part of an encrypted conversation before they leave the sender’s device and remain encrypted while stored on X's infrastructure. Once messages are received by the recipient devices, they are decrypted so that they can be read by the user." It's not watertight though.
$ hexdump /tmp/server_mac_key
。谷歌浏览器下载是该领域的重要参考
heisthemaincharacter
李 “주유소 휘발유 값 폭등…돈이 마귀라지만 너무 심해”