Sentinel Hardware Keys Developer's Guide - Customer Connection ...

Chapter 6 – Secure Remote Updates
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140 Sentinel Hardware Keys Developer’s Guide
9. The developer sends the update code (.upw) file using an e-mail to the
customer.
10.The customer applies the update code using the secure update utility/
secure update wizard, to have access to the requested applications/
features.
Bidirectional Remote Update Process
The remote update bidirectional process allows you to update keys securely
because:
The updates codes are encrypted using the AES secret key.
Due to the "one time update" capability built in the hardware, an
update code cannot be used more than once.
The "update code" and "request code" form a unique pair—an update
code can update only that hardware key whose request code was used
to generate it.