Modifying the original Feistel structure will it be feasible to design a lightweight and robust encryption algorithm. Somehow changing the structure's original flow and adding some mathematical functions there. I welcome everyone's view.
1. You can check SIT (Secure IoT) algorithm which combines Feistel and SPN here
https://arxiv.org/pdf/1704.08688
2. HIGHT, it uses Feistel
www.mdpi.com/1424-8220/14/1/975/pdf
3. TWINE, it uses Generalized Feistel
https://jpn.nec.com/rd/crl/code/.../twine_SAC_full_v5.pdf
4. FeW, it combines between Feistel and Generalized Feistel
https://eprint.iacr.org/2014/326.pdf
5. SPARX, ARX family which uses Feistel
https://www.nist.gov/sites/.../10/.../perrin-paper-lwc2016.pdf
Or you can in-depth learns about how to construct the S-boxes here
https://www.iacr.org/archive/ches2014/.../87310223.pdf
Hopefully it can help you, any further help, just email me or send me a message
Dea Saka Kurnia Putra Sir, thank you for your response I will go through the materials shared by you and in case of any queries I will share my problems. It will be of great help if you share me your e-mail i address in the inbox.
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