PLS ATTEMpT ALL QUESTIONS WITH NO PLAGIARISM Full disk encryption is an option f

Question

PLS ATTEMpT ALL QUESTIONS WITH NO PLAGIARISM

Full disk encryption is an option for users who are concerned that their computer disk might be accessed or stolen.
(a) Explain at least three different ways in which an attacker could overcome basic login password protection on a laptop in order to access the files on the machine.
(b) Why, in general, do you think data origin authentication is not a requirement for file encryption systems?
(c) Describeoneofthemodesofoperationthathasbeenproposedforfulldisk encryption and explain what properties it has that are particularly suitable for this type of application.

Explanation / Answer

Answer A:

Answer B:

First of all it will create more overhead on the system secondly data can be originated anywhere, it does not matter the only thing matters that you have the proper credentials to open the data. If you have the credentials it means you are authorized to view the data. So the latter does not matter.

Answer C:

Block cipher-based mode is one of the modes used to encrypt data.

Before the age of the computers cryptography consisted of substitution ciphers and transposition ciphers. Both of them use characters as the smallest unit of information. When computers came, they could use the bits as their smallest unit of information, and each character in the plain text message had at least seven bits (considering each character as a 7 bit ASCII entity) or eight bits (for EBCDIC standard which is more commonly used). The entire message in the plain text is taken as a block containing several bits and put into the algorithm. Computer aided cryptography led path to several new cryptography algorithms, all of them can perform bit level permutation and combination. Given the key, both message encryption and decryption has to be performed using computers.

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