Hi,
a few people on forum and many in Discord have asked about Legic Prime support for Flipper Zero, but it never got a traction to start implementing it.
I would like to help with this, hopefully 
, manageable task.
Key points:
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It is operating on standard 13,56MHz frequency, so no aditional HW for Flipper is needed.
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It’s security is broken for a long time, but as it is using proprietary protocol, Flipper can’t even detect these cards right now.
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There is an excellent presentation about it’s protocol and weaknesses: 26C3: Legic Prime: Obscurity in Depth 1/7 - YouTube
and corresponding slides: https://fahrplan.events.ccc.de/congress/2009/Fahrplan/attachments/1506_legic-slides.pdf -
Proxmark3 has perfectly working implementation of Legic Prime for reading, writing and emulating: proxmark3/cmdhflegic.c at master · Proxmark/proxmark3 · GitHub
This should greatly help bringing this functionality to Flipper.
I have following equipment at my disposal: multiple Legic Prime cards and original readers, Proxmark3, Flipper Zero.
I will provide what I can (dumps, etc.), I can even send a card by post.
Many commercial places in Europe use this product and many users in community have asked for it so this would be great ability for our dolphins to master 