Modification of the original message (plaintext) with the LCG random number generator algorithm and encryption with the affine cipher algorithm to produces a dynamic and safe random message (ciphertext) compared to just the affine cipher algorithm. The plaintext is converted to ASCII code and stored in a data list. The data list that contain the plaintext changes the position of the data where each plaintext column is moved to an odd column and even columns are filled by random numbers generated by LCG. The data list is then changed again by adding value to each column with random numbers generated by the programming language and then it encrypted with the affine cipher algorithm. The total number of ciphertexts can be twice as many as the plaintext. The results obtained are not the same ciphertext character even though the plaintext has the same character. Ciphertext generated in the first run program will be different for the next run program or dynamic encryption. To restore a ciphertext to the plaintext is done based on the affine cipher decryption function and the steps to modify the message that was done before.
Extension Service and Tax Consultation Office or Kantor PelayananPenyuluhan dan Konsultasi Perpajakan (KP2KP) of Gunungsitoli city needs acontinuous effors in improving service for taxpayer. Application of CRM(Customer Relationship Management) by utilizing information technology isone of choices. The research begins with the analysis of non-functional systemsthat include hardware and software used, as well as analysis of the usersinvolved, NPWP Registration Procedure, Income Tax Payment Procedure.System design in the form of Context Diagram and DFD, and database designin the form of ERD. The step is implementation the program using PHP,implementation the database using MySQL, and the use of SMS Gatewaythrough online SMS service Zenziva and email. After tested with white boxmethod, this system can improve the loyalty aspect and the opening of easycommunication channel with high response rate by preparing notificationfacility of confirmation of NPWP registration, consultation feature for taxpayerto convey suggestions, confirmation of payment, and warning of paymentschedule either via SMS and email. This system also can improve taxpayer(customer) satisfaction, increase corporate/government earnings (Tax Target),increase the competitive advantage compared with other regions. This systemcan also generate Consultation Reports and reports via SMS and emailnotifications.
Desa-desa yang berada dalam kecamatan Andam Dewi, Tapanuli Tengah belum maksimal dalam memanfaatkan informasi dari Biro Pusat Statistik (BPS). Informasi yang diperoleh padajika menggunakan Google Maps masih bersifat standar dan kurang menampilkan potensi desa-desa di kecamatan tersebut. Salah satu upaya untuk lebih mendorong perekonomiannya adalah mendorong pengembangan desa-desa dengan berbasis pada kearifan lokal, sumber daya alam dan keunikannya, sehingga dapat menjadi desa-desa yang inovatif dan kreatif. Sistem Informasi Geografis Pada Aplikasi Desa Pintar Berbasis Mobile dibuat untuk memberi kemudahan bagi pemerintah, masyarakat, wisatawan dan calon investor dalam menemukan informasi potensi desa seperti perikanan, perkebunan, perdagangan, wisata, budaya dan pelayanan umum. Sistem ini dibuat dengan menggunakan bahasa pemrograman PHP dan Java serta MySQL sebagai basis datanya. Hasil dari penelitian ini adalah aplikasi pemetaan secara geografis berbasis mobile.
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