Forum › MIFARE general topics and applications › Classic 1K : Write To A Previous Block Without Re-Authenticating › Reply To: Classic 1K : Write To A Previous Block Without Re-Authenticating
Hi Matthew,
An authentication has effect only to one sector. If you move to another sector, you must authenticate to this sector.
Let’s say you want to read from block 1 and 5. Block 1 belongs to the first sector and block 5 to the second. Then you must authenticate to block 0 (or 1, 2, 3), read from block 1. Then you must authenticate to block 4 (or 5, 6, 7) and read block 5.
The TapLinx team
An authentication has effect only to one sector. If you move to another sector, you must authenticate to this sector.
Let’s say you want to read from block 1 and 5. Block 1 belongs to the first sector and block 5 to the second. Then you must authenticate to block 0 (or 1, 2, 3), read from block 1. Then you must authenticate to block 4 (or 5, 6, 7) and read block 5.
The TapLinx team
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