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All Journal Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP) Al-Syakhsiyyah : Journal of Law and Family Studies Journal of Mathematics Education and Science
Qonita Qurrota A’yun
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Religion Humanities Education Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences

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MENELISIK REGULASI PENGGUNAAN TENAGA KERJA ASING (TKA) TERHADAP EKSISTENSI PEKERJA LOKAL DI INDONESIA DALAM PERSPEKTIF KEADILAN HUKUM Lailatul Mufidah; Uswatul Khasanah; Qonita Qurrota A’yun
Al-Syakhsiyyah: Journal of Law & Family Studies Vol 2, No 2 (2020)
Publisher : Fakultas Syariah IAIN Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21154/syakhsiyyah.v2i2.2594

Abstract

ABSTRAK: Pemerintah menerbitkan Peraturan Presiden No. 20 Tahun 2008 tentang Penggunaan Tenaga Kerja Asing (TKA) sebagai upaya untuk meningkatkan investasi, alih teknologi dan alih keahlian kepada pekerja lokal, serta perluasan kesempatan kerja. Oleh karena itu, investasi asing di Indonesia sepenuhnya ditujukan untuk meningkatkan kesejahteraan masyarakat. Namun, regulasi tersebut menimbulkan keresahan di masyarakat karena dinilai lebih memihak dan memudahkan masuknya pekerja asing. Hal ini dapat dilihat dalam Pasal 9, di mana izin menggunakan TKA tidak diperlukan lagi cukup dengan RPTKA. Selain itu, masih banyak TKA di Indonesia yang tidak memenuhi kualifikasi pendidikan dan keahlian sebagaimana diatur dalam Pasal 5, sehingga tujuan diundangkannya regulasi tersebut sebagai alih keahlian dan teknologi tidak benar-benar terjadi. Hal ini tentunya sangat bertentangan dengan prinsip keadilan hukum untuk menciptakan keadilan dan kesejahteraan masyarakat. Sanksi dan norma bagi pengguna TKA yang tidak sesuai dengan ketentuan perundang-undangan harusnya diterapkan, karena meningkatnya jumlah investor yang turut serta membawa pekerja kasar dari negara asalnya sangat kontradiktif dengan jumlah angkatan kerja di Indonesia yang terus meningkat setiap tahunnya.
Kombinasi Algoritma Vigenère menggunakan Pembangkit ` Kunci RC4 dan ECB menggunakan Pembangkit Kunci LFSR Qonita Qurrota A’yun; Auliya Rahman; Syaripuddin
Journal of Mathematics Education and Science Vol. 9 No. 1 (2026): Journal of Mathematics Education and Science
Publisher : Universitas Nahdlatul Ulama Sunan Giri Bojonegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32665/james.v9i1.5067

Abstract

This research aims to demonstrate the process of encryption and decryption, as well as the implementation of a program in the form of a Graphical User Interface (GUI), using a combination of the Vigenère Cipher algorithm with an RC4 key generator and the Electronic Code Book (ECB) algorithm with an LFSR key generator. This combination was chosen because the Vigenère Cipher, as a classical algorithm, has a simple substitution structure, while RC4 is able to produce a highly random keystream. Meanwhile, ECB is an efficient modern block encryption method, and LFSR can generate a sequence of random bits based on a polynomial function. Together, these methods form a layered approach to securing messages. The data used in this study consists of plaintext messages in text form chosen by the author. The results show that the encrypted message can be successfully decrypted back into its original form. Therefore, this study proves that combining the Vigenère Cipher algorithm with RC4 and the ECB algorithm with LFSR can be effectively implemented and preserve data authenticity.
PERBANDINGAN ALGORITMA HASH FUNCTION MD5, SHA-1 DAN SHA-256 DALAM MENJAGA INTEGRITAS DATA PADA SISTEM FILE GAMBAR Welly Dona Permatasari; Qonita Qurrota A’yun; Rafika Husnia Munfa’ati
Jurnal Ilmiah Matematika dan Pendidikan Matematika Vol 18 No 1 (2026): Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2026.18.1.20749

Abstract

Cryptography plays a crucial role in maintaining the integrity of digital data, particularly image files that are susceptible to alteration or mani pulation. This study aims to compare the MD5, SHA-1, and SHA-256 hash algorithms in detecting changes in 30 e-KTM image files in JPG format. Each file was processed using all three algorithms and then tested by altering a single pixel and compressing the file. The parameters analyzed included changes in hash values, hashing processing time, and algorithm sensitivity based on the avalanche effect. The results of the study indicate that all three algorithms were able to detect all changes in the image files. MD5 has the fastest processing time, SHA-1 provides a higher level of security than MD5, while SHA-256 produces the highest avalanche effect and offers the best security level despite requiring a longer processing time. Thus, SHA-256 is the most effective algorithm for maintaining the integrity of image files.
Co-Authors Auliya Rahman Lailatul Mufidah Rafika Husnia Munfa’ati Syaripuddin Uswatul Khasanah Welly Dona Permatasari