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All Journal Indonesian Journal of Electrical Engineering and Computer Science IJECS: Indonesian Journal of Empowerment and Community Services
Novia Lestari
Universitas Islam Negeri Imam Bonjol
Religion Humanities Education Health Professions Public Health Social Sciences

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Arnold’s cat map secure multiple-layer reversible watermarking Aulia Arham; Novia Lestari
Indonesian Journal of Electrical Engineering and Computer Science Vol 33, No 3: March 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v33.i3.pp1536-1545

Abstract

Reversible watermarking is a novel approach to digital copyright protection that allows the embedding of watermarks into digital data using multiple layers while retaining the ability to recover the original content without data loss. This method provides a unique solution for securing digital data while maintaining the integrity and quality of the content. Nonetheless, new challenges have emerged with the increase in attacks on this method, as reversible watermarking methods lack security keys, making it easy to extract and modify hidden data. In this paper, we present a method for multiple-layer reversible watermarking with security keys, with the goal of addressing the challenges posed by attacks and improving data protection within embedded content. The method uses arnold’s cat map to scramble images, and data embedding in predetermined iterations serves as the methods security key. We put the method through its paces with six grayscale images. With this method, the embedding capacity can reach 2.999 bpp across four layers of embedding, while the visual image quality can reach 22.01 dB. The outcomes from this approach are that the security of multiple-layer reversible watermarking can be enhanced while preserving the capacity to embed data in each layer.
Digital Madrasah: Empowering Technology Literacy for Teachers Subhan Ajrin Sudirman; Muhammad Naufan Rizqullah; Novia Lestari; Yuharnida Yuharnida; Bagus Pribadi; Rahman Pranovri Putra
IJECS: Indonesian Journal of Empowerment and Community Services Vol. 6 No. 1 (2025): IJECS: Indonesian Journal of Empowerment and Community Services
Publisher : Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/ijecs.v6i1.6216

Abstract

The digital transformation of madrasahs has become imperative in the current digital era to address the evolving challenges of educational relevance. The digitalization process in madrasahs, particularly at MAN 3 Tanah Datar, encounters several obstacles, including limitations in infrastructure and human resources. Through the Science and Technology Literacy initiative spearheaded by the Faculty of Science and Technology at UIN Imam Bonjol Padang, this community service activity aims to strengthen technology literacy among teachers at MAN 3 Tanah Datar. The initiative includes training on the use of digital media creation and assessment applications, such as Canva, Quizizz, and Wordwall. The methodology employed encompasses three phases: pre-implementation, implementation, and post-implementation. The outcomes indicate that the training successfully enhanced teachers' technological skills, which in turn contributed to creativity and innovation in teaching and learning processes. Monitoring and evaluation activities showed that the use of Canva, Wordwall, and Quizizz at MAN 3 Tanah Datar increased student engagement and motivation, but there is still a need for media adaptation to accommodate a variety of learning styles. Continued efforts in digitalization are necessary to realize the full potential of a digital madrasah. Technology-based training programs like these are expected to bolster the madrasah's human resources, equipping them to meet global challenges in the digital age. Keywords: digital madrasah; technology literacy; teacher
Co-Authors Aulia Arham Bagus Pribadi Muhammad Naufan Rizqullah Rahman Pranovri Putra Subhan Ajrin Sudirman Yuharnida Yuharnida