Signal 대 WhatsApp: 실제로 채팅을 비공개로 유지하는 메신저는 무엇인가요?
2026년 6월 24일 · 읽은 시간: 2분 · 댓글
두 앱 모두 종단 간 암호화를 사용한다고 말합니다. 그러나 암호화는 이야기의 일부일 뿐입니다. 실제로 그것들을 구분하는 것은 다음과 같습니다.
종단 간 암호화가 실제로 의미하는 것
- End-to-end encryption means only you and the person you're messaging can read the contents of your messages. Not the app company, not your mobile carrier, not the government — unless they get into your actual phone.
- Both Signal and WhatsApp use end-to-end encryption for message content. On this point, they are equal. The difference is everything else.
메타데이터 문제
- Even if WhatsApp can't read your messages, it can — and does — collect metadata: who you talk to, how often, at what times, your location, your device, your contacts list.
- Meta (WhatsApp's parent company) uses this data to build advertising profiles and shares it across Instagram and Facebook.
- Signal collects almost none of this. The only data Signal holds about you is your phone number and the date you last connected.
오픈 소스 vs. 폐쇄 소스
- Signal's code is open source — anyone can read it, audit it, and verify it does what it claims. Security researchers around the world have done exactly this.
- WhatsApp's code is closed. You have to take Meta's word for it that the encryption is correctly implemented and that no backdoors exist. Given Meta's track record with user data, that's a lot of trust.
신호의 실질적인 단점
- The only real drawback: your contacts need to have Signal too. You can't send a Signal message to a WhatsApp user.
- Signal has grown significantly — it now has over 100 million users. Many people already have it.
- The practical approach: keep WhatsApp for group chats with family who won't switch, move sensitive conversations to Signal.
Advantage: 신호 — 개인정보 보호가 중요한 경우 큰 차이를 보입니다.
