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OTP & OTP 2.0

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Mykhailo Shevchuk 2023-12-17 23:14:40 +02:00
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doc/magic_cards_notes.md
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@ -469,7 +469,34 @@ hf 14a info
## Mifare Classic Direct Write OTP
^[Top](#top)
TODO
Chip manufactured by iKey LLC as a bypass for Gen1 filters.
Support Direct Write as CUID, but block0 can be written only once.
The chip had an issue in the protocol implementation.
The reader could interrupt radiofield for 2-3 microseconds (standard pause in the bit period of ISO14443-2).
After the response to first `26 (7)` command, but before the following `93 70` command. In that case original M1 card will stop the flow, but OTP will continue it.
That issue led to the development of the filters against that card and discontinuation of the production.
As a successor, [OTP 2.0](#mifare-classic-otp-2.0) was created.
### Characteristics
^[Top](#top)
* Initial UID is AA55C396
* Android compatible
### Identify
^[Top](#top)
Only possible before personalization.
```
hf 14a info
...
[+] Magic capabilities : Write Once / FUID
```
## MIFARE Classic OTP 2.0
^[Top](#top)