Acme Widgets currently uses a 1024-bit RSA encryption standard company wide. The company plans to convert from RSA to an elliptic curve cryptosystem. If it wants to maintain the same cryptographic strength, what ECC key length should it use?

A) 160 bits

B) 512 bits

C) 1,024 bits

D) 2,048 bits

The answer is "Option A".

Explanation:

The elliptical curve cryptography system needs much shorter keys for cryptography, and it is very powerful because of the RSA cryptography method. It is also known as a key of 1024-bit, which is in comparison is equal to the 160-bit ECC key for cryptographic, that's why other options are not correct, which is defined as follows:

In option B, It is higher the ECC key system, that's why it's wrong. In option C, It is a part of the RSA system but its value doesn't match the ECC system, that's why it is wrong. In option D, It's valued is just double to the RSA system, that's why it is wrong.