Telegram - False Sense of Security

[ferpado]

Let's talk about Telegram: Secure or Overhyped?
Telegram is one of the most popular messaging apps globally, often seen as a secure alternative. But behind its reputation lies controversy and some questionable technical decisions. Let’s dive into the pros and cons.
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1 Proprietary Encryption Protocol (MTProto)
Telegram uses its proprietary **MTProto** protocol instead of established solutions like Signal Protocol.
Issues:
- Not fully open-source, making it hard to audit thoroughly.
- Cryptography experts have criticized its unnecessary complexity and lack of transparency.
- Historical bugs revealed weaknesses in its design against sophisticated exploits.
What it means:
If MTProto is compromised, all your non-end-to-end encrypted (non-E2EE) messages are at risk.
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2 No Default End-to-End Encryption (E2EE)
Unlike Signal, Telegram does **not** enable E2EE by default for regular chats.
Issues:
- Regular chats are encrypted only between the user and Telegram’s servers.
- This means Telegram can technically access stored messages.
What it means:
- Messages can be legally requested by governments.
- Malicious employees (or hackers) could potentially access sensitive information.
Temporary Fix:
- Use “Secret Chats,” but even then, you’re still relying on MTProto.
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3 Centralized Servers
Issues:
- Telegram relies on centralized infrastructure, unlike decentralized alternatives like Matrix.
- While servers are distributed across countries, Telegram controls the encryption keys.
What it means:
- A targeted attack or breach could expose massive amounts of data.
- Authoritarian governments could pressure Telegram to hand over sensitive user data.
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4 Lack of Metadata Encryption
Issues:
- Telegram does not encrypt metadata (who messaged whom, when, etc.).
- This data can reveal communication patterns and relationships.
What it means:
Even without message content, attackers or governments could map your social network, identify contacts, or track sensitive behaviors.
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5 Risks with Bots and Advanced Features
Issues:
- Telegram bots, while useful, often collect user data. Many bots are third-party, increasing risks.
- Public groups and channels expose user information to wider audiences.
What it means:
- Users can be targeted by phishing or social engineering campaigns via bots.
- Vulnerabilities in bot APIs could be exploited to leak data.
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6 False Sense of Security
Issues:
Telegram is widely perceived as highly secure, but this is largely **marketing hype**. Many users assume they’re safe just by using it.
What it means:
- Users often share sensitive information or organize activities (legal or otherwise) under a false sense of security, which could have serious consequences.
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So, Should You Ditch Telegram?
Not necessarily, but consider these precautions:
1. Don’t treat Telegram as a completely secure messaging app.
2. For ultra-sensitive conversations, use alternatives like Signal, Matrix, or PGP combined with TOR.
3. Avoid sharing critical information in non-E2EE chats.
4. Be cautious with bots, public groups, and shared files.
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What’s your take?
Have you spotted other flaws or have tips to shareI’d love to hear your thoughts and experiences with Telegram!