Is there any SE Site where we can post questions related to Hacking (Networking)?
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However notice that the FAQ explicitly mentions "protecting assets" and that the closest on topic item to Hacking (Networking) is "network security", so if what you are aiming for is malicious, please take it somewhere else (and by that I mean outside Stack Exchange). Before you post on IT Security make sure you read their FAQ thoroughly (twice), and it wouldn't hurt if you dropped in by their chat room to verify that your question would be welcomed by the community.
If you are more interested in cryptography and cryptographic algorithms, then you should also check out Crypto - Stack Exchange.