Judul: Acceleration of Advanced Encryption
Standard Algorithm Use Dual Graphics Processing Unit
Abstrak: Seiring dengan pesatnya perkembangan teknologi, kebutuhan akan keamanan data dalam jumlah yang besar semakin meningkat. Dalam kriptografi, salah satu algoritme yang dapat diandalkan adalah AES. Algoritme ini dapat mengenkripsi dan mendekripsi suatu data sehingga informasi di dalamnya tidak dapat diakses secara bebas oleh pihak yang tidak berkepentingan. AES memiliki kompleksitas O(n) pada proses enkripsi dan dekripsinya. Semakin besar jumlah data yang diperlukan semakin lama waktu eksekusinya. Oleh karena itu diperlukan pemrograman paralel menggunakan GPU untuk memecahkan masalah ini. Penelitian ini menerapkan algoritme AES pada paralel menggunakan dual GPU dan membandingkan kinerja dengan paralel single GPU. Hasil yang diperoleh menunjukkan bahwa untuk data dengan ukuran di bawah 32 MB dengan penggunaan dual GPU menjadikan waktu eksekusi menjadi lebih lama. Sebaliknya, semakin besar ukuran datanya waktu eksekusi menjadi lebih cepat. Speedup maksimal diperoleh saat menggunakan data 512 MB. Nilai speedup nya adalah 383 kali pada dual GPU dan 271 kali pada single GPU.
Keyword: AES, GPU, encryption, cryptography, parallel, speedup

Judul: Analisis dan Implementasi Algoritme Advanced Encryption Standard (AES) Secara Paralel
Abstrak: AES is an algorithm for symmetric key cryptography. AES is expected to replace Data Encryption Standard (DES) as a recognized standard for various applications. The complexity of AES encryption and decryption process is O(n), it has fast computation in both encryption and decryption but its execution time will increase as the input data increase. In this research the AES algorithm would be parallelized by dividing the data to each processor (domain decomposition) and by dividing the constituent computing of AES to each processor (functional decomposition), and their performance would be analyzed. Parallel implementation of AES algorithm uses Message Passing Interface (MPI). The objectives of this research are to measure and analyze the performance of parallel AES algorithm using performance metrics. The best result of the parallel AES algorithm in this research is in the decryption process using domain decomposition method. A file with 118.525 MB size has 127.227 seconds decryption execution time using sequential AES algorithm, whereas using 16 processors, its decryption execution time is 34.896 seconds. The speedup is 3.646 and the efficiency is 0.228. This result is not good enough because the speedup is not equal to the number of processors used and the efficiency is below one. This is because the AES decryption in this research has a fast computational process, yet it has a big overhead for data communication. The worst result of the parallel AES algorithm is in the decryption process using functional decomposition method. Using the same file and three processors, the decryption execution time is 168.089 seconds. The speedup is 0.755 and the efficiency is 0.252. This is due to the fact that computing process decomposition is not equally distributed among the processes and the use of MPI blocking communication routine which cause a big overhead for data communication. Both parallel algorithms used in this research are not cost-optimal
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Judul: Etno-ornitologi Burung Kancilan Flores (Pachycephala nudigula nudigula Hartert 1897) pada Masyarakat Lio di Taman Nasional Kelimutu
Abstrak: Bare-throathed whistler is one of several wild birds in Kelimutu National Park (TNKL) that is believed to have correlation with Lio Community‟s belief. The estimation of Bare-throated whistler‟s population in Kelimutu National Park was about 186.41-1668.07 individual by the density about 0.0389-0.3481 ind/ha with the sex ratio 6.2:1 that spreaded on area with height of 1100 – 1600 masl. The characteristic of Bare-throated whistler‟s habitat is a natural forest with various canopy level, high plant species diversity and high density. The habitat characteristics related to the availability of food in the form of insects, cover, safety and a nesting site. Generally the most of Lio community knew the existence of Bare-throated whistler directly or from their parents‟ stories. The perceptions of Lio Community to the Bare-throated whistler‟s existence is generally support the conservation efforts. The perceptions construct the Lio Community‟s atitude that tend to be conservative to the existence of Bare-throated whistler. The attitude shown by their behavior that not cathing the Bare-throated whistler from the TNKL‟s area or the outside. The attitude have an important role to the existence of Bare-throated whistler in Kelimutu National Park‟s area.
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