Judul: Analisis RSA dengan Penambahan Chinese Remainder Theorem untuk Mempercepat Proses Dekripsi.
Abstrak: RSA merupakan algoritma kunci publik yang keamanannya bertumpu pada kesulitan untuk memfaktorkan modulus n yang sangat besar, tetapi kelebihan ini mengakibatkan lambatnya waktu untuk menyelesaikan proses. Penambahan CRT pada RSA diperlukan untuk mengefisienkan kinerja RSA. Penelitian ini bertujuan untuk mempelajari kinerja RSA dari segi kecepatan dan keamanannya, serta menganalisis algoritmanya. Analisis kecepatan dilakukan dengan mengukur waktu kecepatan rata-rata enkripsi dan dekripsi RSA dan RSA-CRT. Analisis keamanan dilakukan melalui studi literatur. Dari hasil analisis algoritma, dapat ditarik kesimpulan bahwa RSA dan RSA-CRT memiliki kompleksitas yang sama untuk algoritma pembangkitan kunci dan proses enkripsi, yaitu O((lg n)3). Tetapi pada pembangkitan kunci RSA-CRT, ada bagian yang kompleksitasnya O((lg (n/2))2). Algoritma dekripsi RSA memiliki kompleksitas O((lg n)3), sedangkan RSA-CRT memiliki kompleksitas O((lg (n/2))3). Hasil ini dikuatkan oleh hasil implementasi yang memperoleh waktu dekripsi RSA-CRT yang lebih cepat dibandingkan waktu dekripsi RSA. Waktu rata-rata running time proses dekripsi RSA adalah 4211.79 ms, sedangkan pada RSA-CRT diperoleh running time rata-rata proses dekripsi 1372.44 ms. Kata kunci : RSA, RSA-CRT, Chinese Remainder Theorem.
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Judul: Analisis dan implementasi algoritme RSA secara paralel
Abstrak: RSA is an algorithm for public key cryptography. The advantage of RSA is it is difficult to be attacked. Besides that, RSA has shortcomings. For example, execution time of RSA algorithm is longer than other algorithms like DES and RC6. In this research the RSA algorithm would be parallelized by dividing the data to each processor and the performance of the RSA algorithm would be analyzed. Parallel implementation of the RSA algorithm uses Message Passing Interface (MPI).The objectives of this research is to measure and analyze the performance of parallel RSA algorithm using performance metrics. This research uses eight processors with Windows XP SP 2 as operating system. This research uses ASCII text and binary files for the experiment. The result of this research indicates that the RSA algorithm is good when it is parallelized using domain decomposition method because the RSA algorithm has a long computational process, but it has fast communication time. The best result of parallel RSA algorithm in this research is in decryption process. For example, for file size of 4.204.979 bytes, decryption execution time of sequential RSA algorithm is 4207.286 seconds, whereas using the eight process, respectively is 530.762 seconds. The speedup is 7.929 and the efficiency is 0.991. This result is good because ideally speedup is equal to the number of processors used and optimum efficiency is one. The worst result of parallel RSA algorithm is in encryption process with small file sizes. For example, for file size of 116.820 bytes, encryption execution time of sequential RSA algorithm is 0.292 seconds, whereas using the eight process, respectively is 0.066 seconds. The speedup is 4.419 and the efficiency is 0.567. This is because the RSA encryption in this research has a fast computational process, but it also has big overhead for data communication.
Keyword: RSA algorithm, Parallel, Message Passing Interface(MPI), Peformance metrics, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Imago and Egg Hatching Behavior of Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)
Abstrak: Spodoptera frugiperda (J.E. Smith) atau ulat grayak jagung (UGJ) merupakan hama kosmopolitan yang menyebabkan kerusakan berat pada pertanaman jagung di beberapa negara. Penelitian ini bertujuan mempelajari perilaku imago dan penetasan telur UGJ. Perilaku hinggap dan peletakan telur diamati pada pagi pukul 07:00 s.d. 09:00 dan sore pukul 16:00 s.d. 18:00 terhadap 223 imago jantan dan 366 imago betina yang dilepaskan di dalam sungkup kasa berukuran 1.5 m x 1.5 m x 2 m dengan sembilan tanaman jagung. Perilaku imago juga diamati setiap dua jam selama 24 jam terhadap kurang lebih 30 pasang imago. Proses penetasan telur dilakukan dengan mengamati dua puluh kelompok telur setiap dua jam sekali selama dua hari. Tidak terdapat perbedaan pola distribusi hinggap pada beberapa lokasi selama pengamatan pagi dan sore, dan juga diantara jenis kelamin. Sepertiga dari populasi imago hinggap pada tanaman jagung dan secara keseluruhan hinggap pada bagian permukaan atas (adaksial) daun jagung. Sebagian besar imago S. frugiperda meletakkan kelompok telur pada permukaan bawah (abaksial) daun jagung. Imago S. frugiperda aktif malam hari dan seluruh aktivitas bergerak/terbang, kawin, serta meletakkan telur terjadi antara pukul 18:00 s.d. 04:00. Telur S. frugiperda menetas antara pukul 02:00 s.d. 12:00 dan sekitar 75% kelompok telur menetas di antara pukul 02:00 s.d. 06:00., The fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) is a cosmopolitan pest that may cause severe damages on corn in many countries. This research was to study FAW moth and egg hatching behavior. The perching and egg laying behaviors were observed in the morning (7–9 am) and late afternoon (4–6 pm) on 223 males and 366 females moths released inside a 1.5 m x 1.5 m x 2 m cage with 9 corn plants in it. The behaviors were also observed every two hours for 24 hours involving about 30 pairs of moths. Egg hatching processed were carried out by observing 20 egg clusters every 2 hours for 2 days. There were no differences on the pattern of moth perching locations during the morning and afternoon observations, and also between sexes. One third of the moths perched on the corn plants and almost all moths perched on upper surfaces of the corn leaves. About half numbers of egg clusters were laid on the corn plants, and most of them were laid at lower surfaces of the corn leaves. Fall armyworm moths were nocturnal and activities of moving/flying, mating and egg laying occurred between 6 pm to 4 am. Fall armyworm egg hatching occurred between 2 am to 12 am, and 75% of them hatched between 2 am to 6 am.
Keyword: Egg laying, FAW, imago behavior, perching pattern