In feistel cipher , does it matter that number of rounds ? is using more rounds will give the best result? or it's all about the key size ?
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1Does this answer your question? Increase number of rounds for SPN and Feistel ciphers. Simply it increases the attack times, except the upper bound = brute force. – kelalaka Apr 04 '20 at 18:25
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yes increasing the rounds doesn't mean increasing security but why ? – Nadjib Rahmani Apr 04 '20 at 18:37
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2Read the answer, and note that the provided security by any cipher cannot exceed the key search by brute-force. – kelalaka Apr 04 '20 at 18:44