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3) Using limited amount of storage devices for a wide range of customers
If a company (i.e. data processing company or data center for large companies or
agencies) is in a constant exchange of data with many different data recipients, it can use
the benefits of the HS256 S3 to transport data secure and cost-efficiently. Every recipient
receives a smart card with his/her own cryptographic keys. The dispatcher has a copy of
each of the cards with the cryptographic keys of every recipient.
For the transportation of data a smart card with the cryptographic keys of the recipient is
initialized with the HS256 S3 (device PIN required).
Every HS256 S3 is suitable. Subsequently, the data dispatcher does a quick format of the
HS256 S3 with the new cryptographic keys which only takes a few minutes. Complicated
data deletion or overwriting is not necessary, as the data was encrypted with different
cryptographic keys and could only be encrypted and restored by the owner of the old
cryptographic keys provided the data has not already been overwritten.
If data is supposed to be sent to the same recipient in short intervals there is no need to
wait for a personalized HS256 S3 to return. Every HS256 S3 can be used. All you need to
do is initialize it with the recipients cryptographic keys.
The amount can be reduced to the actual amount. Because not every recipient needs their
own HS256 S3. It is irrelevant which of the company’s HS256 S3 is available and used
for transport. Crucial is which cryptographic keys have written the data to the HS256 S3.
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