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
Keyword: 

Judul: Analisis keamanan kriptosistem kunci publik RSA
Abstrak: Seiring dengan meningkatnya penggunaan jalur komunikasi urnum sebagai fasilitas untuk melakukan komunikasi dan pertukaran pesan atau data, menyebabkan metode pengamanan pesan menjadi sangat penting. Salah satu metode yang dapat digunakan untuk mengamankan pesan adalah teknik kriptografi. Dalam kriptografi dipelajari beberapa teknik matematika berkaitan dengan aspek kearnanan informasi. Berdasarkan tipe kuneinya teknik kriplografi dibedakan menjadi dua, yaitu simetri dan asimetrilpublik. Keduanya menggunakan kunei unluk pengarnankan pesannya, bedanya, pada kunei simetri digunakan kunei yang sarna untuk enkripsi dan dekripsi, sedangkan pada kunei asimetri digunakan kunei yang berbeda. Pada tulisan ini akan dibahas salah satu metode dari tipe kunei asimetri, yaitu RSA. Tulisan ini bertujuan untuk mempelajari dan menganalisis a1goritma RSA serta beberapa kemungkinan serangan yang dapat dilakukan oleh musah terhadap kriptosistem ini. Bila beberapa serangan-serangan diprediksi akan teIjadi, maka harus diantisipasi dengan menenlukan a1gorilma RSA dengan karakteristik kunei tertentu yang eukup tahan dan arnan berada pada jalur komunikasi umum, walau memang serangan-serangan tersebut teIjadi. Hasil dari penganalisaan menunjukan bahwa inti kemanan RSA adalah pada masalah RSA dan faktorisasi bilangan komposit. Dengan menghindari kemungkinan dari a1goritma faktorisasi maka didapat algoritma RSAyang eukup tahan dan arnan dalarnjalur komunikasi urnum.
Keyword: 

Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
Keyword: