31 lines
782 B
Markdown
31 lines
782 B
Markdown
# Card Privacy
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## Brief
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The link that is programmed into the card and returned as the NDEF consists of three parts.
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1. The static part
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2. The encrypted part
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3. The authentication part
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```
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lnurlw://yourdomain.com/ln?p=012345&c=6789 example
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^ static
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^^^^^^ encrypted
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^^^^ authentication
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```
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Uses of the parts are as follows:
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| part | use |
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|------|-----|
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| static | specfying the protocol and service location as a URI |
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| encrypted | unique id and counter values encrypted by the card|
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| authentication | a value to authenticate that the entire URI is as generated by the card |
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## NXP NTAG424DNA features
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## Implementation
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