Question 1

What is key sharing?

Accepted Answer

Key sharing splits a cryptographic key into multiple components (shares) using XOR operation. All components XORed together reconstruct the original key. This enhances security by distributing key custody.

Question 2

What is the difference between Insecure and Secure mode?

Accepted Answer

In Insecure mode, generated key shares are displayed directly. In Secure mode, shares are hidden and protected by a 4-digit PIN - you must enter the correct PIN to reveal each share.

Question 3

How are key shares generated?

Accepted Answer

When you enter a Combined Key, the system generates random shares where: Part1 ⊕ Part2 ⊕ Part3 = Combined Key (for 3-part), or Part1 ⊕ Part2 = Combined Key (for 2-part).

Question 4

What is KCV (Key Check Value)?

Accepted Answer

KCV is a checksum calculated by encrypting zeros with the key. Each share and the combined key has its own KCV for verification without revealing the actual key value.

Question 5

What does Force Odd parity do?

Accepted Answer

Force Odd adjusts each byte of DES/3DES keys to have odd parity (odd number of 1 bits), as required by the DES standard for proper operation.

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