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In: Computer Science

Try to make it as simple as you can and explain as much as it needed....

Try to make it as simple as you can and explain as much as it needed.

What are the differences between symmetric encryption and asymmetric encryption? (1 point)

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What is pseudo random numbers? (1 point)

Ans:

What is Moore’s Law? (1 point)

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What are four different block cipher modes? (1 point)

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What is one-time pad? (1 point)

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Expert Solution

Symmetric Key Encryption	Asymmetric Key Encryption
It only requires a single key for both encryption and decryption.	It requires two key one to encrypt and the other one to decrypt.
The size of cipher text is same or smaller than the original plain text.	The size of cipher text is same or larger than the original plain text.
The encryption process is very fast.	The encryption process is slow.
It is used when a large amount of data is required to transfer.	It is used to transfer small amount of data.
It only provides confidentiality.	It provides confidentiality, authenticity and non-repudiation.
Examples: 3DES, AES, DES and RC4	Examples: Diffie-Hellman, ECC, El Gamal, DSA and RSA
In symmetric key encryption, resource utilization is low as compared to asymmetric key encryption.	In asymmetric key encryption, resource utilization is high.

2)

A set of values or elements that is statistically random, but it is derived from a known starting point and is typically repeated over and over. ... It is called "pseudo" random, because the algorithm can repeat the sequence, and the numbers are thus not entirely random.

3)

Electronic Code Book (ECB) – Electronic code book is the easiest block cipher mode of functioning. ...
Cipher Block Chaining – ...
Cipher Feedback Mode (CFB) – ...
Output Feedback Mode – ...
Counter Mode –

4)

one-time pad is a system in which a private key generated randomly is used only once to encrypt a message that is then decrypted by the receiver using a matching one-time pad and key.

venereology answered 8 months ago

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