Judul: Implementasi Kriptografi Visual pada Citra Berwarna Menggunakan Metode Youmaran
Abstrak: Visual cryptography was introduced in 1995 by Moni Naor and Adi Shamir. From that moment visual cryptography has grown. Visual cryptography scheme has changed from the most simple technique which can be decrypted by human visual system until advanced techniques that need computer assistance on decryption process. Visual cryptography was firstly used for binary images, but now it can be used in color images. One of the methods that can be used in visual cryptography for the color image is Youmaran's method. The aim of this research is implementing visual cryptography using Youmaran's method and then analyzing it. This research uses maximum foul' cover images to hide plain image. This research uses Mersenne Twister algorithm to generate random numbers for encryption and decryption process. This research also calculates the PSNR value of the decrypted image. The result from this research indicates that using visual cryptography with Youmaran's method can hide an image in other images. With this method, human eye will not know that in fact there is an image inside the camouflage images.
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Judul: Partisi Informasi untuk Keamanan Citra Berwarna Menggunakan Enkripsi RSA dan Pengacakan Urutan Layer Citra
Abstrak: A secret image that will be transmitted over the public channel on the internet is vulnerable to the intervention by an unauthorized person. One of the technique to establish the image security is using information partition with RSA encryption. RSA algorithm has a high level of security and difficult to be attack if using a big value of different key pair because it is very hard to factoring the large modulus of n. In this research, each pixel of the secret image is encrypted using 32 byte RSA, which is small value of different keypair. The encryption process result four scrambled images. Each image has three layers that are red, green, and blue, thus the encrypted image has 12 layers. We can’t avoid the detection of image by cryptanalist. The attempt to do is increasing the security of secret image with randomization sequence of image layer using a permutation function. Thus, the original image can’t be decrypted even the security of 32 byte RSA have been attacked. The secret image can only be decrypted by the legitimate receiver
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Judul: Definisi zat besi ( Fe ) pada anak babi
Abstrak: Dalam bidang sub sektor peternakan, ternak babi mempunyai prospek yang cukup baik untuk dikembangkan dalam rangka meningkatkan eksport non migas. Namun anak-anak babi yang sedang menyusu sering mengalami defisiensi zat besi (Fe). Bila masalah ini tidak segera ditanggulangi, peternak akan mengalami kerugian. Zat besi dapat diperoleh dari makanan yang berasal dari hewan (tepung tulang, tepung ikan, tepung daging, "skimmed milk"); tumbuh-tumbuhan (leguminosae, rumput-rumputan, biji-bijian) dan mineral alam (Girindra, 1979). Dalam tubuh hewan, zat besi berperanan sebagai pembawa 02 ke seluruh jaringan, juga sebagai pembawa oksigen pernafasan di dalam sel urat daging (Underwood, 1981). Dalam duodenum dan yeyenum bagian atas, besi dalam bentuk ferro akan diserap. Penyerapan ini akan diatur berdasarkan teori "mucosal block" dari Granick. Kemudian dalam plasma darah, besi akan berikatan dengan B₁ globulin dan membentuk transferrin, yang akan segera dibawa ke seluruh jaringan. Kelebihan besi akan diikat oleh apoferritin dan membentuk ferritin yang ditimbun sebagai besi cadangan, terutama di hati. Bila kapasitas besi yang dapat disimpan sebagai ferritin telah jenuh, maka besi akan ditimbun sebagai hemosiderin. Zat besi dalam jumlah yang sedikit akan diekskresikan melalui pengelupas- an epitil, tinja, air kemih, cairan empedu, keringat. ...
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