What are the two main types of covert channel?
Covert channels are generally unauthorized and hidden. And they’re used to send information in a way that violates your security policy. There are two different types of covert channels, covert timing channels and covert storage channels.
What is the purpose of a covert channel?
A covert channel is any communication channel that can be exploited by a process to transfer information in a manner that violates the systems security policy. In short, covert channels transfer information using non-standard methods against the system design.
Which is an example of a side channel attack?
Side-channel attacks (SCAs) aim at extracting secrets from a chip or a system, through measurement and analysis of physical parameters. Examples of such parameters include supply current, execution time, and electromagnetic emission.
What is the purpose of a timing attack?
Timing Attack (TA) is a basic Side-Channel Analysis (SCA) method first published at CRYPTO’96 by Paul Kocher. This method allows extraction of an algorithm’s secret, such as a master key, if the algorithm’s execution time depends on a user input and this secret.
Who is the inventor of the side channel attack?
Finally, we point to various metrics that can be used to quantify the amount of information leakage in a side-channel parameter, and discuss ways to provide resistance to SCAs. Side-channel attacks, first introduced by Kocher (1996), exploit the implementations of cryptographic algorithms or software.
How are side channels used in cryptographic algorithms?
In this chapter, we focus on different side-channel attack modalities in hardware implementations of cryptographic algorithms. Chapter 16, on the other hand, covers side-channels in a processor micro-architecture, which can be controlled by a software, and are visible through it.