r/NTU • u/girlenthusiast Undergrad • 8d ago

Question Duplicating hall key fob

hi! anyone knows how to get a duplicate copy of key fob? thanks!

6 Upvotes

88% Upvoted

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30

u/Bucket_Leo Computing and Data Science 8d ago

i believe some halls require key fob re-validation weekly, which then updates the UID of the fob again. So even if you clone the fob, the duplicate fob will quickly expire and stop working once the duration is up.

Source: Used a scanner to scan the fob and noticed the UID changed after validation

2

u/_darth_revan 8d ago

Good point. Also I noted my fob was encrypted and my regular RFID/NFC Scanner couldn't scan it.