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Text and Image Encryption Using Symmetric Cryptography Ron Rivest Cipher 2 (RC2) Pratiwi, Saniya Rahma; Sari, Christy Atika; Rachmawanto, Eko Hari
Sinkron : jurnal dan penelitian teknik informatika Vol. 8 No. 1 (2024): Articles Research Volume 8 Issue 1, January 2024
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v9i1.13054

Abstract

In the current context, ensuring the secure transmission of data over the internet has become a critical concern, with information technology playing a fundamental role. As society advances into the digital information age, the importance of network security issues continues to increase. Therefore, the need for cryptographic technology has emerged to overcome these challenges. Cryptography includes symmetric and asymmetric cryptography. An example of symmetric cryptography is the RC2 algorithm. RC2 is a symmetric encryption algorithm that uses a single key to encrypt and decrypt data. The ciphertext is then concealed within an image using the Stepic technique. The RC2 encryption method also utilizes symmetric encryption, ensuring the security of the encryption process while maintaining efficient encryption and decryption speeds. The result of this research is that the average percentage of MSE is 0.00%, and for PSNR and AVA are 70.85% and 34.93%. However, the AVA value is quite unstable because the average value is below 40%. Meanwhile, image encryption results in the longer the text that needs to be hidden in the image, the higher the UACI percentage. This is inversely proportional to the NPCR, the longer the text that needs to be hidden in the image, the lower the NPCR percentage. The average results obtained for UACI and NPCR values are 41.46% dan 98.13%.
Aplikasi Pemilihan Umum RT02 RW12 Kelurahan Meteseh Kecamatan Tembalang Kota Semarang Kurniawan, Ilham Triza; Gymnastiar, Okcadian Hanif; Saputra, Satria Yusuf; Cahyani, Anis Putma; Salsabila, Anggita Alya; Hilmi, Gifari Hilal; Arfian, Aldi Azmi; Hisbullah, Muhammad Dafi; Pratiwi, Saniya Rahma; Naufal, Muhammad Rizky
ABDIMASKU : JURNAL PENGABDIAN MASYARAKAT Vol 7, No 2 (2024): MEI 2024
Publisher : LPPM UNIVERSITAS DIAN NUSWANTORO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62411/ja.v7i2.2031

Abstract

Pengembangan Aplikasi Pemilihan Umum RT02 RW12 di Kelurahan Meteseh, Semarang, oleh tim mahasiswa Universitas Dian Nuswantoro bertujuan meningkatkan efisiensi dan partisipasi masyarakat dalam pemilihan ketua RT. Aplikasi ini fokus pada literasi digital, melibatkan masyarakat RT02 RW12, dan memastikan partisipasi maksimal. Tahap pelaksanaan mencakup negosiasi, perancangan, konfirmasi, pengembangan, dan pengujian aplikasi. Sosialisasi berhasil meningkatkan pemahaman dan literasi digital peserta. Aplikasi berbasis Laravel menyajikan calon ketua RT dan visi misi mereka. Tim mahasiswa juga berperan sebagai fasilitator pada pemilihan, menciptakan kesuksesan dalam meningkatkan partisipasi masyarakat. Hasilnya, aplikasi ini bukan hanya meningkatkan efisiensi dan transparansi dalam pemilihan ketua RT, tetapi juga mendorong partisipasi aktif masyarakat serta memberikan kontribusi positif terhadap demokratisasi tingkat lokal. Dengan demikian, pengembangan aplikasi ini berhasil menciptakan dampak positif dalam proses pemilihan umum di tingkat RT.