Judul: Enkripsi Suara pada Raspberry Pi Menggunakan Algoritma AES Dengan Mode OFB
Abstrak: Privasi adalah salah satu aspek yang harus diperhatikan saat ini dikarenakan munculnya isu-isu spionase dan penyadapan yang dilakukan oleh pihak lain terhadap pengguna telekomunikasi selular. Penelitian ini akan memberikan proof of concept tentang pengamanan komunikasi data khususnya data suara dalam telekomunikasi seluler menggunakan sebuah algoritma enkripsi AES dengan mode output feedback (OFB). Algoritma ini akan diimplementasikan ke dalam Raspberry Pi sebagai salah satu media yang memiliki kemiripan dengan smartphone dari segi arsitektur sistem. Hasil penelitian ini belum dapatditerapkan pada smartphone dengan sistem operasi berbasis Android sebagai sebuah program aplikasi. Kendala yang dihadapi adalah bahwa program aplikasi enkripsi suara hasil penelitian ini dikembangkan menggunakan bahasa pemrograman yang belum didukung sepenuhnya oleh arsitektur sistem smartphone.
Keyword: AES, output feedback, proof of concept, Raspberry Pi

Judul: Analisis hasil enkripsi file wave menggunakan sandi algoritme berkelamp-massey
Abstrak: Secured voice data transfer is an important thing to be noticed, especially when dealing with confidential data. A technique used in assuring the transfer is encrypting the data. This technique applied symmetric key stream cipher Left Feedback Shift Register (LFSR) generator. The key developed by LFSR generator also contains high level of safety because it has semirandom byte stream key with large period. However, the influence of voice encryption using LFSR symmetric key to the wave format files is not widely known. Besides, this technique's safety level must be examined further as a consideration for larger use. This research tends to test the impact of encryption using LFSR symmetric key stream cipher on voice recorded as wave file format, and its safety level. Wave files employed on this research recorded using Sound Recorder application on Windows Operation System. These files have various fast and slow rythm. The result of this research was the change on the voice after being encrypted, with different intensity of noise, that will affect the clarity of voice's message contents. Some voices have message that could be identified well, and others couldnn't be identified at all. The result of the analysis showed that the factors influence the encryption were the rythm of the voice, and the type of polynomial applied (primitive / non primitive; polynomial degree, and linear complexity measured by Berlekamp- Massey Algorithm). Furthermore, the encrypted voices could be recovered to their genuine source while the key to decrypt is similar with the encryption key.
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Judul: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology