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When accurately executed, the only cryptosystem known to be unbreakable is called: "One-time Pad" (Option D)
<h3>What is a Crypto System?</h3>
The one-time pad is a cryptographic approach that cannot be broken but needs the usage of a single-use pre-shared key that is not less than the message being delivered. A plaintext is coupled with a unique secret key in this manner.
It should be emphasized that in cryptography, a cryptosystem is a collection of cryptographic algorithms that are required to perform a certain security function, such as confidentiality. A cryptosystem is often composed of three algorithms: one just for key generation, one for encrypting, and one for deciphering.
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Full Question:
When correctly implemented, what is the only cryptosystem known to be unbreakable?
A) Transposition cipher
B) Substitution cipher
C) Advanced Encryption Standard
D) One-time Pad
Answer:
First shift - 1101
Second shift - 0110
Third shift - 1011
Fourth shift - 1101
Fifth shift - 0110
Sixth shift - 1011
Explanation:
Each time you shift a register to the right, you do 3 things:
- The rightmost digit drops off
- You move the next three digits over one position to the right
- You fill in the leftmost position with one of the numbers from your serial input.
Contents are initially 1011. The 1 on the right disappears. The leftmost 3 digits (101) end up in the last 3 positions of the register. The first position of the register takes a number from the serial input, which is 1 in this case. So you end up with 1101.
Do this a second time. The rightmost 1 is gone, the 110 end up as the last 3 positions of the register, and you end up with 0 in the leftmost position. This one is 0110.
The remaining 4 follow the same pattern.
<span>Boolean expressions can be combined by using a logical operator to create compound expressions. A boolean expression is an expression that takes into account and evaluates specific data, which is in the form of true and/or false. A compound expression is merely a statement of expressions.</span>
None of the above and this has to be 20 characters so yea
