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: Aplikasi Keamanan Data Shapefile Menggunakan Algoritme Kriptografi AES
Abstrak: Geographic Information System (GIS) is an important part of information systems because GIS contains classified spatial data and information in any fields. This research is focused on securing GIS vector data (shapefiles) and also reading the shapefiles. A shapefile combines maps and tables, both have a related information on each other. The usage of Rijndael (AES) cryptography algorithm and Key Derivation Function (KDF) would assist in improving the security of shapefiles. However, besides cryptography algorithm, authentication service is also implemented to improve the security mechanism in order to prevent unauthorized users gain full access to the application which provides the shapefile security. The application was executed using fifteen shapefiles and analyzed in terms of loading time, size, and iteration count between the encrypted and non-encrypted shapefiles. The biggest shapefile (33.79 MB) could be decrypted and displayed in two seconds with 10000 iterations (ten times in complexity from the standard iteration, which is 1000) and fifteen characters of salt. By using this application, authorized users could read their shapefiles with common functions (zoom, extent, pan, etc) and protect the classified one with no penalty in overall performance.
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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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