What Is a Signal Safety Number?
If you're using Signal for private messaging, you might have come across the term "Signal Safety Number." But what exactly is it, and why should you care? In this article, we'll break down what a Signal Safety Number is, why it matters for your security, and how you can check and verify it to make sure your conversations stay private.
Understanding Signal Safety Numbers
Signal Safety Numbers are a core part of how Signal ensures your messages and calls remain secure. Every time you start a conversation with someone on Signal, the app creates a unique safety number for that chat. This number is a fingerprint of the encryption keys used between you and your contact.
Think of the safety number as a digital fingerprint that proves your messages are going directly between you and the other person — without anyone else snooping in the middle. If the safety number changes, it could mean one of you reinstalled Signal, changed devices, or potentially that someone is trying to intercept your communication.
Why Should You Verify a Signal Safety Number?
Signal uses end-to-end encryption by default, which means only you and your chat partner can read your messages. However, verifying the safety number adds an extra layer of security by confirming that the encryption keys haven’t been tampered with.
- Protects Against Man-in-the-Middle Attacks: Verifying your safety number ensures there’s no third party intercepting your messages.
- Confirms Device Authenticity: If your contact reinstalls Signal or switches phones, their safety number changes. Verifying helps confirm that it’s really them on the other end.
- Peace of Mind: Knowing your conversations are truly private gives you confidence in using Signal for sensitive communication.
How to Find and Verify a Signal Safety Number
Checking and verifying a safety number on Signal is straightforward. Follow these simple steps to review and confirm your safety numbers with your contacts:
- Open a chat: Launch Signal and open the conversation with the person you want to verify.
- Access contact info: Tap on the contact’s name at the top of the chat to open the chat settings.
- View Safety Number: Scroll down and tap on View Safety Number. You’ll see a QR code along with a long string of numbers.
- Verify with your contact: You can verify the safety number in two main ways:
- Scan QR code: If you’re physically near the person, have them open their safety number QR code on their device, and then tap Scan Safety Number on your screen to scan it.
- Compare digits: If you’re remote, share the numeric safety number via a secure channel (like a phone call or in person) and confirm both numbers match exactly.
- Complete verification: Once the safety numbers match and you verify, Signal marks the conversation as secure.
That’s it! Taking just a minute to verify safety numbers can significantly boost the confidence in your Signal chats.
When Does Your Signal Safety Number Change?
It’s normal for your Signal Safety Number to change occasionally. Here are some common reasons why it might happen:
- Reinstalling Signal: If you delete and reinstall the app, your encryption keys renew, and the safety number updates.
- Switching Devices: Moving Signal to a new phone or device generates a new safety number for your conversations.
- Security Updates: Sometimes Signal may update encryption protocols, which can cause safety numbers to change.
Whenever you notice a safety number change, it’s a good idea to verify it again. This helps ensure you’re still communicating securely without potential interception risks.
Final Tips for Using Signal Safely
- Regularly Verify Safety Numbers: Especially with important contacts, check your safety numbers after reinstalling Signal or switching devices.
- Use Signal’s Official Channels: Always download Signal from signal.org or trusted app stores to avoid fake or compromised versions.
- Keep Your App Updated: Signal frequently releases security improvements, so keep your app up to date for the best protection.
- Be Wary of Unsolicited Requests: If someone asks you to verify safety numbers unexpectedly, confirm their identity via a separate channel.
By understanding and using Signal Safety Numbers effectively, you can maximize your privacy and trust the security that Signal provides. For more information, visit signal.org.
在【signal官网】，我们坚信隐私保护是一项基本人权。这也是为什么我们不断努力，通过社区互动与技术创新，为您提供最安全的通讯体验。今天，我们很高兴地宣布几项重大更新，这些更新将进一步提升您的使用体验。
强大的端到端加密
与往常一样，您的所有消息、语音和视频通话都受到业界领先的开源 Signal 协议的保护。我们无法读取您的消息，其他人也无法读取。这种加密不仅限于文字，还包括您分享的图片、视频和文件。
"隐私并非可选项，它是【signal官网】运作的基础。每一条消息，每一次通话，无一例外。"
社区互动的新方式
通过听取社区的反馈，我们引入了全新的加密贴纸功能。现在您可以：
- 使用默认的生动贴纸包表达情感
- 创建并分享您自己的个性化贴纸
- 所有贴纸在传输过程中均被完全加密
加入我们，共同成长
【signal官网】是一个由用户支持的非营利组织。我们没有广告，也没有追踪器。我们的发展完全依赖于像您一样重视隐私的人们的捐赠和支持。感谢您与我们一起，为建立一个更安全的数字世界而努力。