How to present password to ST25TV02K?

[Arna Lee]

Posted on January 30, 2018 at 07:16

Hi Sir,

In the data sheet of ST25TV02K, it introduces that:

'

Present password command specificity Before doing a present password command, it is necessary to obtain a valid random number through the command ‘Get_Random_Number’ (see Section 6.4.41: Get Random Number) The passwords must be presented encrypted as explained in a Technical Note available on request.

'

But I don't find the '

Technical Note

' to explain how the password is encrypted and presented?

As my understand, 

1, execute 

Get_Random_Number command to get a random number (two bytes);

2, some rule to generate an encrypted password with the random nuber and raw password(four bytes);

3, execute 'Present password' command with the encrypted password.

Can you review if I am right and tell the detail for step 2?

Thanks,

Arna

[Berenice BENVEGUDA · Accepted solution]

Posted on January 30, 2018 at 09:25

Hello Arna Lee,

Thank you for your question and your interest on this product !

Please contact your ST sales office to get the technical note which is available only under NDA.

Best Regards,

Berenice