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All Journal JURNAL SISTEM INFORMASI BISNIS Jurnal Buana Informatika Jurnal Transformatika Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat TELEKONTRAN: Jurnal Ilmiah Telekomunikasi, Kendali dan Elektronika Terapan Bakti Cendana: Jurnal Pengabdian Masyarakat INSERT: Information System and Emerging Technology Journal Jurnal Dialektika Informatika (Detika) HOAQ (High Education of Organization Archive Quality) : Jurnal Teknologi Informasi Journal Of Information And Technology Unimor (JITU) Transformasi Jurnal Pengabdian Masyarakat Intimas (Jurnal INTIMAS): Inovasi Teknologi Informasi Dan Komputer Untuk Masyarakat J-Icon : Jurnal Komputer dan Informatika Jurnal Pengabdian Masyarakat Bangsa Jurnal Inovatif Wira Wacana Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia Genitri: Jurnal Pengabdian Masyarakat Bidang Kesehatan Jurnal Indonesia : Manajemen Informatika dan Komunikasi Jurnal Sistem Informasi (JASISFO)
Tiwuk Widiastuti
Universitas Nusa Cendana
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences

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Journal : Jurnal Transformatika

 1 
Pengamanan Citra Digital Terenkripsi Menggunakan Kombinasi Steganografi Bit Matching dan Kriptografi Cipher Feedback (CFB) dengan Pembangkit Bilangan Acak Linear Congruential Generator (LCG). Widiastuti, Tiwuk
Jurnal Transformatika Vol 21, No 1 (2023): July 2023
Publisher : Jurusan Teknologi Informasi Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/transformatika.v21i2.6978

Abstract

In this study, the design and manufacture of an encrypted digital image security system was carried out by combining bit matching steganography and cryptographic cipher feedback (CFB) using a linear congruential generator (LCG) as a key generator. The test material used 60 message images measuring 120x120 pixels with 1 cover image measuring 64x64 pixels. The results of the study were obtained: (1) the image can be hidden but there is an increase in the size of the embedding file with an average difference of 459.1167 KB (kilobytes) or an increase of 2135.65%, (2) The image can be reconstructed, the physical image of the extraction result is the same as the original image with an MSE value = 0, but there is a change in size that varies with an average difference of 3.433333 KB (kilobytes) or by 16.20%,  (3) Some robust tests such as image rotation testing, brightness manipulation, addition of gaussian noise make the extracted image damaged. The image is resistant to all contrast tests. Salt and pepper noise testing does not damage the image too much, the image is still resistant to salt and pepper noise testing of 0.001 with an average MSE = 0
Penerapan Data Mining Dalam Strategi Bisnis Menggunakan Algoritma Apriori Bloemhard, Putri E; Pandie, Emerensye Sofia Yublina; Fanggidae, Adriana; Rumlaklak, Nelci Dessy; Widiastuti, Tiwuk; Sina, Derwin Rony; Nabuasa, Yelly Yosiana
Jurnal Transformatika Vol. 22 No. 1 (2024): July 2024
Publisher : Jurusan Teknologi Informasi Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/transformatika.v22i1.10194

Abstract

Strategi yang diambil dalam mengelola bisnis kuliner sangat penting dalam memenangkan persaingan. Data transaksi penjualan dari Chicken Brotus selama tahun 2016 hingga 2023 memberikan gambaran penting mengenai pengelolaan strategi pemasaran dan manajemen persediaan. Dalam penelitian ini, algoritma Apriori digunakan untuk mencari hubungan antar item penjualan dalam satu dataset. Hasil pengujian terhadap 11.123 record data, dengan kombinasi nilai minimum support 8% dan minimum confidence 25% serta minimum support 10% dan minimum confidence 25%, menghasilkan pola analisis frekuensi dan aturan asosiasi. Analisis menunjukkan bahwa item terlaris adalah es teh jumbo dengan nilai support 46,5%. Selain itu, ditemukan bahwa jika konsumen membeli ayam geprek biasa komplit, maka 63,1% kemungkinan mereka juga akan membeli es teh jumbo. Hasil ini memberikan wawasan berharga bagi Chicken Brotus untuk mengembangkan strategi pemasaran dan pengelolaan persediaan yang lebih efektif dan efisien. Dengan demikian, Chicken Brotus dapat meningkatkan penjualan dan kepuasan pelanggan melalui strategi yang didasarkan pada data yang akurat dan analisis yang mendalam
Co-Authors Abdi Keraf, Marselino K.P. Adi Sebastianus Molla Adriana Fanggidae Agus Setyobudi Ahmad Taufik Ardean Raflian Arfan Y Mauko Baun, Diandra Bertha S. Djahi Bertha Selviana Djahi Bertha Selviana Djahi Bertha Veronika Da Silva Pinto Bloemhard, Putri E Derwin R Sina Derwin R Sina Derwin Rony Sina, Derwin Djahi, Bertha S. Djahi, Bertha Selviana Dumanauw, Yesaya Evanmarch Dwi C Djahilape Emerensye S. Y. Pandie Emerensye Sofia Yublina Pandie Emerensye Sofia Yublina Pandie Fanggidae, Adriana febby, jurgan Fios, Ignasius Kristoforus Siuk Hanna Florenci Tapikap Immanuel K P Rini Inggrid Raga Djara Juan Rizky Mannuel Ledoh Kabosu, Maria Inansintia Elvira Kornelis Letelay Lehot, Fransisco Ronaldo Lestari, Ayu Triyuni Lete, Patrisius Remby Lobo, Franklin Anugrah Steveinson Mage, Marnon Yolinda Chrisma Malelak, Ruvina Febrianti Maria Louise Ludgardis Muku Marnon C. Y Mage Marylin S. Junias Meiton Boru Meiton Boru Meiton Boru Metkono, Denni Irvanto Missa, Wanto I Mola, Sebastian Adi Santoso Mola, Sebastianus Adi Santosa Mustakim Sahdan Naatonis, Djohan Rudolf Andriano Nabuasa, Yelly Yosiana Nelci D Rumlaklak Nelci Dessy Rumlaklak Nelcy Rumlaklak Ngefak, Videl Richard Nita Novita Non, Erwin T. W. Nunes, Ingratcia Pa, Bernard Jose Adrian Junio Ajilo Polly, Yulianto Triwahyuadi Ratu, Nalfayo Christian Romy O. D. Djami Rumlaklak, N.D Rumlaklak, Nelci D. Rumlaklak, Nelci Dessy Safitri, Aisyah Rizki Sani, Michelle Sarinah Basri K Sebastianus A S Mola Sebastianus Adi Santoso Mola Sihotang, D.M Sihotang, Dony Martinus Sina, Derwin R. Sintha Lisa Purimahua Suhada, Dimas Tabelak, Dion Stekiko Melfin Tarus, Karen N.V Tas'au, Emilia Thimothy Ariel Masangin Tokan, Diana Inda Carmilla Triyanto Umanailo, Ali Umasangadji, Fachry Muhammad yelly y nabuasa Yoshua Patriot Thundericco Yulianto Triwahyuadi Polly