Signal is an instant messaging application focused on privacy protection, developed by Signal Foundation and Signal Messenger LLC. It provides end-to-end encryption to ensure that the content of a user's messages, voice and video calls can only be accessed by the sender and receiver and cannot be read by any third party, including Signal itself.
Key Features
- Text Messaging and File Transfer: Users can send text, images, videos and files, all protected by end-to-end encryption.
- Voice and Video Calls: Signal supports HD voice calls and stable video calls, ensuring the security of the content.
- Group Chat: Users can create group chats, all of which also enjoy end-to-end encryption.
Security Features
- Forward secrecy: Even if a key is cracked in the future, it will not affect the security of previous communication records.
- Minimal data storage: Signal does not store user metadata, which enhances privacy protection.
- Open source transparency: Signal's code is completely open source, allowing anyone to review its security.
User Experience
Signal has a clean and intuitive user interface, supports multiple platforms (e.g. iOS, Android, Windows, etc.), and offers personalised setting options such as notification management and theme selection to enhance the user experience.
