Detailed Answer
Three encoding methods: Fixed coding: buttons map to fixed codewords — simple but easy to copy; Rolling coding: the codeword changes with each transmission (rolling), cannot be replayed or copied — the most secure; Learning code: the receiver learns the transmitter's codeword (one-key pairing), making replacement easy. The LDER LD series uses rolling coding + learning codes, and XINGJIA offers fixed/rolling options. For high-security scenarios (anti-tampering), choose rolling coding.
| Fixed | Simple / easy to copy |
| Rolling | Copy-proof / secure |
| Learning | Easy replacement |
Note:Choose rolling-coding products if you need anti-miscontrol / anti-tampering.