WhatsApp security

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WhatsApp security

  1. 1. How does WhatsApp send your messages over the net? BY JAVIER HURTADO
  2. 2. Whatsapp security protocol  WhatsApp encrypts messages since versión 2.8.3 (2012)  WhatsApp uses the RC4 protocol to encrypt messages  Android:  Reversed MD5 hash  IMEI  iPhone:  MAC Address  MD5 hash
  3. 3. Obtaining hash in Android IMEI: 012345678912345 =>
  4. 4. Obtaining hash in iPhone MAC Address: AA:BB:CC:EE:FF=>
  5. 5. WhatsApp security bug  First it sends a plain text packet with:  Client OS  WhatsApp app version  Port used for the message transmission (encrypted)  443  5222  5223  YOUR PHONE NUMBER
  6. 6. WhatsApp security bug (iPhone)
  7. 7. WhatsApp security bug (Android)
  8. 8. Precautions  Preferably do not use WhatsApp on public WiFi networks (cafes, airports…)  If there isn’t other option use a VPN

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