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Match the following Secret Key Algorithms (list I) with Corresponding Key Lengths (List II) and choose the correct answer from the code given below:

$\begin{array} { } & \text{List I} & { } & \text{List II} \\ (a) & \text{Blowfish} & (i) & \text{128 – 256 bits} \\ (b) & \text{DES} & (ii) &  \text{128 bits} \\ (c ) & \text{IDEA} & (iii) & \text{1-448 bits} \\ (d) & \text{RC5} & (iv) & \text{ 56 bits} \end{array}$

Code:

  1. (a) – (iv), (b)-(ii), (c ) -(ii) , d-(i)
  2. (a) – (iii), (b)-(iv), (c ) -(i) , d-(ii)
  3. (a) – (iii), (b)-(iv), (c ) -(ii) , d-(i)
  4. (a) – (ii), (b)-(iii), (c ) -(iv) , d-(i)
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Option (C) is correct.

DES we know works by taking a 64-bit value and a 56-bit key.

For RC5 refer: https://link.springer.com/content/pdf/10.1007%2F3-540-60590-8_7.pdf

IDEA(International Data Encryption Algorithm) operates on 64-bit blocks using a 128-bit key. // refer: https://en.wikipedia.org/wiki/International_Data_Encryption_Algorithm

Blowfish is a symmetric-key block cipher, it has a 64-bit block size and a variable key length from 32 bits up to 448 bits. // refer: https://en.wikipedia.org/wiki/Blowfish_(cipher)

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