29 lines
923 B
Markdown
29 lines
923 B
Markdown
# Card Privacy
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## Brief
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The URI 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://card.yourdomain.com/ln?p=A2EF40F6D46F1BB36E6EBF0114D4A464&c=F509EEA788E37E32 URI example
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lnurlw://card.yourdomain.com/ln?p= &c= static
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A2EF40F6D46F1BB36E6EBF0114D4A464 encrypted
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F509EEA788E37E32 authentication
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```
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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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