Judul: Economic Policy For Sustainable Large Pelagic Fisheries Management In East Flores Regency
Abstrak: Tuna and skipjack are categorized as large pelagic fish resource which has a high economic value and exploited for food, nutrition and export. The exploitation of those fishes in East Flores Regency is increasing in the last ten years, and raised the question of sustainable fisheries management. Based on these condition, the research aims to evaluate fisheries resource management, too analyzed economic surplus, to evaluate fisheries sustainable and economic policy analysis for sustainable management of the large pelagic fisheries. Survey method was used in this research and data analysis using bioeconomic, economic surplus, multi dimensional scaling and analysis hierarchy process. Based on analyses, tuna and skipjack resource exploitation is still under maximum economic yield (MEY) level. According to the calculation of the average degradation and depreciation of tuna are 0.350 and 0.351, and skipjack 0.354 and 0.275, since of the value are 0 less than 0.5 indicate that the tuna and skipjack have not degraded and depreciated. The best large pelagic fisheries (tuna and skipjack) management is carried out under level of MEYof tuna which production rate 6,072 tons per year and the effort, as many as 42,904 trips per year, with economic rent of Rp 88.9 billions per year. The economic surplus of producer is Rp 1.5 million per ton and consumer surplus is Rp 46 million per ton. MEY level of skipjack for production rate is 4,652 tons per year, and the effort 20,256 trips per year, with economic rent Rp 38.9 billion per year. The economic surplus of producer is Rp 0.31 million per ton and consumer surplus is Rp 0.58 million per ton. Sustainability analysis showed that three of five dimensions which are ecology, technology and institutional are good condition, but two dimension which are social and economy has to be improved. Policy toward sustainable large pelagic fisheries management should consider environmental friendly technology is the first priority, follows by monitoring and evaluation, price, labor, conflict management and marketing policies.
Keyword: Bioeconomic, Economic Surplus, Resource Policy, Sustainable Fisheries Management, Tuna and Skipjack, East Flores Regency

Judul: Resource Management of Skipjack (Katsuwonus pelamis) in Pelabuhanratu, Sukabumi District, West Java
Abstrak: Katsuwonus pelamis (skipjack or Skipjack Tuna) is one of the major pelagic fish commodities in Palabuhanratu Archipelagic Fishing Port (PPN Palabuhanratu) and become important aspect in the development of fisheries industrialization especialy for non-tuna species. Geographically, Palabuhanratu bay is situated in Fisheries Management Area (WPP) 573 on Indian Ocean. As the vast waters, fisheries management can be initiated from a small area, for example in the bay area. To understand the biological characteristics of fish such as skipjack (Katsuwonus pelamis Linnaeus, 1758) is crucial information to realizing fisheries resources management in some region. This research aims to determine the weight and length relationship, size composition, growth pattern and decent size of skipjack fishing in Palabuhanratu. Data obtained from the result of landing catches in PPN Palabuanratu from December 2012 to May 2013. Through a series of data catches of skipjack during the period 2002 to 2011 estimation made for catch effort at the level of Maximum Sustainable Yields (MSY), Maximum Economic Yield (MEY) and Open Access (OA). MSY, MEY and OA are the bio-economic indicator to formulate appropriate policies for Skipjack resources management in Palabuhanratu. The research was conducted on fish landed in Palabuhanratu by using payang gear, gillnet, and trolling. From the results of the calculation of the weight and length noted that males skipjack have a negative allometric growth pattern which means that its length growing faster than its weight. While skipjack females have an isometric growth which means its length growth pattern equal to its weight. The maximum length of tuna were obtained during the study was 710 mm. Length of fish for the first gonads mature was estimated of 523 mm, with the result that so the tuna catch is a the minimum worthines of cakalang fishing was 523 mm. Recognizing these data, if compared with the size of tuna caught during the study, only 11.2 % were larger than the size of a decent catch, this is an indication of the outset of the recruitment overfishing in Palabuhanratu. Total males mortality rate (Z) was 2.0988 fish per year and for females amounted to 0.8415 per year. While the rate of exploitation of both males and females are equal to 0.9 per year. The catch and effort at the level of Maximum Sustainable Yield (MSY) are 305.283 kgs /year and 3.898 trips /year. While estimating the value of the Maximum Economic Yield (MEY) and Open Access (OA) at the level 240.380 kgs/year; 2.101 trips/ year and 303.434 kgs/year ; 4.201 trips/year. Fox models analysis shows that overfishing has occurred since 2006 with the utilization rate of 129 % as calculated in the last year (2011) has undergone economic over fishing. Some forms of fisheries management proposed in this research include: restrictions on fishing quotas at MSY level of 78,32 Kgs/Trip and to MEY 114,43 Kgs/Trip; the policy of mesh size; conservation efforts; season control / fishing areas (spawning ground and fishing ground); rotation in fishing (fishing with alternate day) ; restrictions on the issuance of fishing licenses for new fishing vessels; Co-management among stakeholders; law enforcement (enforcement) and
Keyword: Pelabuhanratu Bay, Bioecological parameters, Bioeconomics, optimization, management.

Judul: Perbandingan Algoritma Message Digest 5 (MD5) Dan Secure Hash Algorithm 1 (Shai) Untuk Autentikasi Pesan
Abstrak: Seiring dcngan meningkatnya penggunaan internet sebagai media pertukaran pcsan. metodc pcngamanan pcsan menjadi sangat penting. Nilai suatu pesan yang ingin dijaga keutuhan atnu intcgritasnya menycbabkan pesan tcrscbut hanya baleh dimodifikasi olch pihak yang bcrhak. Namun pada rcalitanya, pesan tersebut akan mendapat ancaman dari scorang penyusup. Bentuk ancaman terjadi apabiJa pcnyusup dcngan suatu cara. dapat mengubah isi pesan terscbut untuk bcrbagai kepcntingan. Apabila isi pesan telah bcrubah dad bentuk aslinya, maka pesan terscbut dikatakan sudah tidak aulcnlik (asli) Iagi. Snatn metodc yang efektif untuk mcnguji kcautentikan suatll pesan digllnakan tcknik kriptografi. Pada kal)'a ilmiah ini akan dibahas algoritma Message Digest 5 (MDS) dan Secure !-lash Algorithm (SHAI) untuk autentikasi pesan.
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