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

Chapter 1 – Introduction
Contents Glossary Index Troubleshooting
Frequently Asked Questions
Question 1 - What is the Secure Communication Tunnel?
The Secure Communication Tunnel is an end-to-end secured session
between the client and the Sentinel Key for providing secure private communication.
The communication packets are encrypted using the AES
algorithm, for which the session key is generated using ECC-based key
exchange (ECKAS-DH1).
It provides maximum protection against the following types of attacks that
can foil the security of your protected applications:
Record/playback attacks
Driver emulation attacks
Middle layer key communication attacks
Brute force attacks
14 Sentinel Hardware Keys Developer’s Guide
The tunnel is created at the time of obtaining a license and is maintained
throughout the session. The tunnel can exist over a local workstation for
stand-alone applications and on a subnet for network application.
The following diagrams depict how the protected application and Sentinel
Key communicates over the secure communication tunnel, in network and
stand-alone modes.