<p class="Abstract">In cryptography, we know the symmetric key algorithms and asymmetric key algorithms. We know that the asymmetric key algorithm is more secure than the symmetric key algorithm. Affine Cipher uses a symmetric key algorithm. In this paper, we introduce the Affine Cipher using asymmetric keys. Asymmetrical keys are formed from rectangular matrices.</p>
The ElGamal cryptosystem is an asymmetric cryptosystem using commutative algebra. Currently, applications of commutative algebra are very vulnerable to attack. For this reason, some experts have developed a public-key cryptosystem based on non-commutative algebra. This study proposes the ElGamal cryptosystem using a matrix as the private key to guarantee the non-commutative algebra concept. The result of the cryptosystem is still working on a matrix of a specific size. The results show that we can modify the key generating algorithm, encryption, and description algorithms so that the proposed system can work.
Pada era revolusi teknologi 4.0, transformasi big data yang dikumpulkanmelalui internet pada segala bidang kehidupan (The Internet of Things)merupakan suatu keharusan. Akan tetapi internet bukanlah media komunikasiyang cukup aman karena rawan terhadap penyadapan informasi oleh pihakpihak yang tidak berhak mengakses informasi tersebut.Kriptografi merupakan salah satu bidang keilmuan untuk menjaga keamananinformasi. Salah satu sistem kripto yang masih digunakan sampai saat iniadalah sistem kripto ElGamal yang diperkenalkan oleh Taher ElGamal . Padasistem kripto ElGamal klasik dan sistem kripto modifikasi ElGamal yangdikontruksikan oleh Marc Joye, masing-masing sistem kripto ini menggunakankonsep bilangan bulat (integer). Fakta ini memotivasi suatu ide untukmenggantikan konsep bilangan bulat (integer) menjadi suatu matriks yangberukuran n n yang dinamakan dengana General Linear Group . Keunggulandari sistem kripto yang diusulkan adalah terdapat ruang plaintext yang lebihbesar dari sistem sebelumnya, sehingga ciphertext menjadi lebih acak dankeamanan pengiriman data menjadi lebih aman.Penelitian ini merupakan jenis penelitian studi literatur. Sedangkan tujuan daripenelitian ini adalah untuk memodifikasi sistem kripto ElGamal hasilkonstruksi Marc Joye menggunakan konsep General Linear Group sehinggadihasilkan suatu modifikasi sistem kripto ElGamal usulan yang lebih aman darisistem kripto ElGamal hasil konstruksi Marc Joye. Untuk itu, pada makalah inidiusulkan suatu modifikasi yang menggabungkan keunggulan dari sistem kriptoElGamal yang dikontruksikan oleh Marc Joye dan prinsip general linear grup.Hasil menunjukkan bahwa modifikasi sistem kripto ElGamal yang dihasilkanharus menggunakan general linear khusus yaitu matriks-matriks sirkulan yanginvertible atas modulo p.
The logistic linear regression model can be used to determine the chances of students obtaining an grade point below 3.00. Binary logistic regression models can also be used to analyze internal and external factors that are thought to affect student achievement index. Internal factors come from the students themselves, while external factors come from the family and society. Research population The population of this study were college students in Pangkalpinang, Bangka Belitung Islands province. Sampling was carried out by cluster sampling based on certain groupings. The method used in this study was a survey of students in universities in Pangkalpinang using a questionnaire. The questionnaire contains Y variables in the form of achievement index and X in the form of independent variables, namely father's education, mother's education, monthly allowance, motivation, student attitudes, domicile, gender and study time. Based on these variables, all internal and external factors affect the student achievement index. The percentage of internal and external factors shows the number is above 60% and the analysis also shows that 37.5% of the students' GPA is less than 3.00.
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