Research-based learning—STEM learning activities: Developing a secure CryptoKey by using rainbow antimagic coloring of graph to improve students combinatorial thinking skills
Dafik Dafik, Tita Khalis Maryati, Ika Hesti Agustin, Rosanita Nisviasari, Ika Nur Maylisa, Elsa Yuli Kurniawati · 2021
The combinatorial thinking skills are esensially important in now day era. The recent research regarded to improving the higher-order thinking skills is research-based learning (RBL) together with a STEM approach. Our research aims to describe a framework of RBL-STEM learning activities in developing a secure CryptoKey by using rainbow antimagic colorig of graph to improve the students combinatorial thinking skills. By rainbow antimagic coloring, we mean a bijection f : V ( G ) → {1, 2, …, | V ( G )|}. The associated weight of an edge uv ∈ E ( G ) under f is w f ( uv ) = f ( u ) + f ( v ). The bijection f is called an edge-antimagic vertex labeling if every edge has a distinct weight. Further f is called a rainbow antimagic labeling of G if all edge weights induce the rainbow colors and it should be guaranteed there exist a rainbow path for every u to v , where u, v ∈ V ( G ). The resulting rainbow antimagic coloring graph can potentially generates a secure CryptoKey.