How I Hacked Learning Codes of the Key Fob of a Car Assembled in My Country
Demonstrates hardware analysis of an automotive key fob using a logic analyzer and HackRF to clone unprotected learning code RF signals.
Summary
Automotive Keyless Entry Security
Modern vehicles typically implement cryptographic rolling code algorithms to prevent keyless entry signals from being captured and replayed by unauthorized attackers.
Hardware Disassembly and Chip Identification
Disassembling a key fob from a locally assembled vehicle revealed an HS2240 integrated circuit configured to transmit vulnerable learning codes rather than secure rolling codes.
Signal Capture with Logic Analyzers and SDRs
Analyzing circuit emissions with a logic analyzer confirmed predictable RF transmissions, which were then captured and replayed using a HackRF software-defined radio.
Replay Exploitation and Automotive Vulnerabilities
Because learning codes lack cryptographic replay protection, captured transmissions allow attackers to unlock vehicle doors repeatedly without the original key.
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