Judul: Pengembangan sistem keamanan transaksi peta digital menggunakan teknik kriptografi
Abstrak: Peta digital (shapefile) pada bidang tertentu memerlukan biaya yang besar dalam proses pembuatannya, sehingga memerlukan layanan keamanan berupa perlindungan dari pengaksesan serta penggandaan secara ilegal. Salah satu cara untuk memberikan layanan keamanan tersebut yaitu dengan mengimplementasikan teknik kriptografi pada proses transaksi shapefile. Penelitian ini mengembangkan suatu sistem keamanan transaksi untuk shapefile dengan mengkombinasikan algoritma advanced encryption standard (aes), algoritma rivest shamir adleman (rsa), dan teknik steganografi citra least significant bit (lsb) yang dapat memberikan layanan kerahasiaan dan autentikasi. Sistem dikembangkan menggunakan metode pengembangan security life cycle yang dimodifikasi. Penelitian ini menghasilkan sistem transaksi shapefile berbasis web yang dilengkapi dengan layanan keamanan berupa kombinasi ketiga algoritma yang telah disebutkan di atas. Hasil pengujian menunjukkan bahwa sistem telah memenuhi layanan keamanan kerahasiaan dan autentikasi.
Keyword: aes, kriptografi, rsa, shapefile, steganografi lsb

Judul: Pengembangan Bagian Offline pada Shapefile Encryption System (SES)
Abstrak: Geographical Information System (GIS) data are classified as expensive and sensitive data. The biggest threat to be dealed by GIS data at the moment is the spread of illegally accessed and distributed by unauthorized party. Currently, most of protection methods that are applied on GIS data focused on the use of digital watermarking. But, this method does not restrict GIS data from being accessed and distributed illegally. This research intends to develop a protection system for GIS data in shapefile form by combining Advanced Encryption Standard (AES) algorithm, Rivest Shamir Adleman (RSA) algorithm, and image steganography technique Least Significant Bit (LSB) which can provide confidentiality and authentication service. As a result, a standalone application is built using the security life cycle development method. The application is being tested on five different shapefile data to measure the effect from four different RSA key lengths towards the execution times needed to perform encryption and decryption process.
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Judul: Biologi Reproduksi ikan belanak Chelon subviridis (Valenciennes 1836) di Perairan Karangsong, Indramayu
Abstrak: Greenback mullet (Chelon suviridis) belong to family of Mugilidae. Greenback mullet have a high economic value in Karangsong water. Information of C. subviridis in this location is limited, whice is necessary to study on reproduction for its management. Through this study, reproduction pattern of C. subviridis in Karangsong water are determined. The study was conducted from December 2012 to May 2013. Total number of fishes that taken during the study was 336 individuals. The results showed that the sex ratio between males and females is 1:2,03 with Chi-square test. Condition factors ranged from 0,6881 to 0,8377 %. Greenback mullet males mature more rapidly that females with mature gonad of 114 mm for male and 102 mm for female. Peak spawning season of C. subviridis in the waters of Karangsong. Greenback mullet is thought to occur in early February. Reproductive potential of C. subviridis is quite large in the amount of 9.691 to 173.335 eggs. Eggs diameter of C. subviridis ranged from 0,18 to 0,75 mm with the mode of spread of two types of spawning peaks with partial (partial spawner).
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