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All Journal TIN: TERAPAN INFORMATIKA NUSANTARA Indonesian Counseling and Psychology
Harahap, Rahmadani
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Implementasi Algoritma Skipjack Untuk Mengamankan Audio Harahap, Rahmadani
TIN: Terapan Informatika Nusantara Vol 2 No 1 (2021): Juni 2021
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

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Abstract

One of the important things to ensure the confidentiality of data or information is encryption. Encryption uses an algorithm that can encode all bit streams of a message, skipjack is a 64-bit electronic codebook algorithm. The parameters used for encryption are 80-bit keys, and have 32 rounds for the encryption and decryption process. This algorithm can be used in one of the four modes specified in FIPS 81 for use in the Data Encryption Standard (DES). The algorithm that will be used for cryptography is said to be safe if it meets three criteria. The three criteria are the mathematical equations used must be complex, so that the algorithm is difficult to solve analytically, the cost used to solve the ciphertext exceeds the value of the information, and the time required to decipher the ciphertext exceeds the length of the information time. The strength of any encryption algorithm depends on its ability to withstand attacks. which is intended to determine the key or uncrypted communication. Broadly speaking, there are two types of attacks, namely brute-force and shortcuts. Therefore, in this paper we will discuss the extent to which the skipjack algorithm guarantees the security of hidden information.
Gimkit Media Strategy in UbD-Based Classroom Services to Improve Students' Time Management Skills Harahap, Rahmadani; Rizka Harfiani; Irsyad Mubarak
INDONESIAN COUNSELING AND PSYCHOLOGY Vol. 5 No. 2 (2025): INDONESIAN COUNSELING AND PSYCHOLOGY (JUNE)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/icp.v5i2.65780

Abstract

This research departs from the problem of students' low time management skills which have an impact on learning disorganization, habit of postponing tasks, and lack of discipline. Therefore, the researcher integrated three main components, namely Gimkit media, classical guidance services, and Understanding by Design (UbD) approach as an intervention strategy to improve students' time management skills. The purpose of this study was to determine whether the gimkit media strategy in UbD-based classical services can improve students' time management skills. The research method used is classroom action research in the form of a spiral cycle consisting of planning, acting, observing, and reflecting stages. The sample was students of class X.10 of State Senior High School 3 Medan. Data were analyzed using the percentage formula. The results showed a significant increase in students' time management skills after participating in classical guidance services designed using the Understanding by Design (UbD) approach and Gimkit interactive media. This can be seen from the increase in the average score of the questionnaire from 23.6 in the pre-cycle to 36.2 in cycle III, as well as the increase in the number of students in the “Good” and “Very Good” categories from 11% to 95%. Gimkit media effectively increased student engagement in the service process. Classical guidance services as a group coaching medium proved to be able to create a reflective and solutive learning atmosphere. Through discussion, open reflection, and evaluation of personal commitment, students showed awareness and changes in mindset and behavior towards time management.
Co-Authors Irsyad Mubarak Rizka Harfiani