How to Verify a Signal Contact
If you're new to Signal or just want to feel extra confident about your security, verifying a Signal contact is a simple but powerful step. It ensures you're chatting with the right person and your messages aren’t being intercepted. I’ve used Signal daily for years, and verifying contacts quickly became one of my favorite little security habits. In this guide, I'll walk you through exactly how to verify a Signal contact, share some handy tips, and clear up a few quirks that might trip you up at first.
Why Verify a Signal Contact?
Before we get into the how-to, let's quickly touch on the why. Signal uses strong end-to-end encryption by default, so your messages are already private. However, verifying a contact adds an extra layer of security by confirming that your contact’s encryption keys haven’t been tampered with. It’s like making sure you’re actually talking to your friend and not an impostor or someone sneaking in the middle. Plus, it helps prevent man-in-the-middle attacks, which, while rare, are still possible in theory.
Signal’s official documentation at signal.org explains this well, but here’s the bottom line: verification gives you peace of mind that your conversations stay between you and your intended contact.
How to Verify a Signal Contact: Step-by-Step
Alright, let’s dive into the practical steps. I’ll cover both mobile (Android/iOS) and desktop since the process is pretty similar but worth noting.
On Mobile (Android & iOS)
- Open the Signal app and navigate to the chat with the person you want to verify.
- Tap on their name or profile picture at the top of the chat screen to open the contact settings.
- Look for the option that says “Verify Safety Number” or something similar. On some versions, it might say “View Safety Number”.
- Tap it, and you’ll see a long string of numbers — this is your Safety Number. It represents your encryption keys.
- Now, in real life or via a trusted secondary communication method (like a phone call or face-to-face), compare the Safety Number with your contact. You can read aloud, exchange screenshots, or scan a QR code (more on that below).
- If the numbers or QR codes match exactly, tap “Mark as Verified” or “I’ve Verified”.
Once you’ve done this, Signal will subtly notify you if this Safety Number ever changes — a sign that your contact might have reinstalled Signal or changed devices. That’s a great reminder to double-check again.
On Desktop (Windows/Mac/Linux)
- Open the Signal desktop app and click the chat with the contact you want to verify.
- Click the contact’s name at the top of the window to open the chat details.
- Click on “View Safety Number”.
- You’ll see both a numeric code and a QR code.
- To verify, you and your contact can exchange codes or scan each other’s QR codes using your mobile device (inside Signal, tap the “Verify Safety Number” option and then choose “Scan QR Code”).
- If everything matches, confirm the verification on your device.
Pro Tips & Common Quirks When Verifying Signal Contacts
- Repeated reinstalls reset Safety Numbers: If your contact reinstalls Signal or switches phones, their Safety Number will change. Signal will warn you with a little shield icon next to their name, so don't ignore it! Double-check the new safety number before continuing sensitive chats.
- QR code scanning is faster and less error-prone: Instead of typing long strings of digits, scanning QR codes is quicker and avoids typos. This is especially handy if you’re verifying in person.
- Verifying via voice or video call: If meeting up physically isn’t possible, the next best thing is to read or share the Safety Number during a trusted voice or video call. It’s less risky than sending numbers over another messaging app.
- Verification is strictly optional but recommended: You don’t have to verify every contact, but I recommend verifying those you frequently message or when sharing sensitive info. It’s a quick step that takes just seconds and adds a lot of security.
- Beware of screenshot quirks: Sometimes, Signal might not allow you to screenshot Safety Numbers or QR codes due to security settings. If that happens, just write the numbers down or use another device’s camera.
- Group chats don’t have verification: Unfortunately, you can’t verify entire groups—only individual contacts. For groups, you’ll want to verify each member separately if you’re concerned.
Wrapping It Up: Why It’s Worth the Effort
Verifying a Signal contact might seem like an extra step, but honestly, it’s one of those small habits that quickly becomes second nature. It’s like double-locking your door at night — you might not need it every day, but when you do, it feels great knowing you took that extra precaution.
Once you get the hang of finding and comparing Safety Numbers (or scanning QR codes), it only takes about a minute and really boosts your confidence in the security of your chats. Plus, it’s a neat way to introduce friends or family who are new to Signal to the idea of encryption and privacy without overwhelming them.
If you want to learn more about Signal’s encryption and how verification fits into it, check out the official guides and FAQs on signal.org. They keep their resources updated and beginner-friendly.
So next time you add a new contact or notice a Safety Number change, give verification a go. Your future self (and your private conversations) will thank you!
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。