Encryption and stenography

Question 1

What is encryption?

Answer 1

Is how we achieve confidentiality, it does not hide the data, but makes the data incomprehensible

Question 2

What are the three states of data?

Answer 2

Data at rest, Data in use, and data at transit

Question 3

What is stream cipher?

Answer 3

Takes and encrypts information byte by byte

Question 4

What is block ciphers?

Answer 4

It encrypts your information block by block usually in 164 byte parts

Question 5

What is the comparison between block and stream ciphers

Answer 5

Stream is easier to reverse and faster.

Question 5

What is the comparison between block and stream ciphers

Answer 5

Stream is easier to reverse and faster.

Question 5

What is the comparison between block and stream ciphers

Answer 5

Stream is easier to reverse and faster vs Block is harder to reverse and slower

Question 6

modes of operation

Answer 6

ECB-weakest Cipher block chaining-errors affect whole chain Cipher feedback-works like stream cipher Ouput feedback-works like stream cipher Counter mode-strongest

Question 7

What is steganography?

Answer 7

It does not encrypt the information it hides the information inside media by replacing some bytes within the image.