What is Sub Bytes
Explain what is meant by Sub Bytes.
Expert
Sub byte uses the S-box in order to perform the byte-by-byte substitution of block. The left most 4 bits of byte are used as the row value and rightmost 4 bits are used as the column value. These row and column values serve as the indexes in the S-box to select a unique 8- bit value.
State requirements for the process of message authentication.
Explain why it is not desirable to reuse the stream cipher key?
What are the types of attacks you think are addressed by message authentication? Why?
Specify the ways through which the secret keys may be distributed to the two communicating parties.
Illustrate the differences between the MAC and Hash function?
List out the various application and benefits of IP security?
A) Provide a specific illustration of how inference control might be implemented in the database.B) For a public-key encryption system (like PGP), list some areas for and against utilizing the similar key pair for both encryption and signature.
State the difference between end-to-end encryption and link?
Explain the term triple encryption?
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