The International Data Encryption Algorithm (IDEA) is a block cipher developed in 1991 by James Massey and Xuejia Lai.

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How do I generate decryption keys for the IDEA algorithm from the 128 bit key?

I am trying to implement IDEA algorithm in C#, just to learn how it works. I have taken a 128 bit binary key and generated the 52 encryption keys using the following code: ...
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What are the exact steps to decryption in International data Encryption Algorithm (IDEA)?

Can anyone tell me what are the exact steps for decryption in IDEA algorithm? I am doing that in this way: Taking multiplicative and additive inverse modulo of encryption keys. Creating decryption ...