6/11/2023 0 Comments Cracking mifare ultralightAuth0 controls the page range from 0x03 – 0x30 (0x00 = disabled).Basically a 3DES (Triple DES) key (16 bytes split into key 1 and key2, (ke圓=key1)) is used for Authentication Only! Depending on the configuration of Auth0 & Auth1 Page/Block (2a byte 0 & b Byte 0) depends on what pages/blocks are accessible. proxmark3> hf mfu ucrdcardĬontrary to belief (I admit making an initial mistake here), Ultralight C contents are not encrypted by default! (Unless cryptography has been added by the controlling application). The remaining 4 blocks contain the 3DES Key needed for authentication, and are write only, so the key cannot be simply recovered. The Card has 0x2f Pages (or blocks) which means 47 decimal blocks. But I will summarise my findings below: Ultralight C Card Size & Readable Blocks For those interested you can follow my progress at . This week has been an interesting learning process, and it has corrected some misconceptions I had about the card. Ultralight C cards are HF (13.56MHz) tags that are part of the Mifare family. There have been no secrets this week while I’ve been trying to add Mifare Ultralight C support to the Proxmark.
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