Judul: Algorithm construction of HLI hash function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice

Judul: Algorithm Construction of HLI Hash Function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice

Judul: Kajian tekanan masyarakat terhadap taman nasional : Studi kasus pemungutan bambu di Taman Nasional Meru Betiri Jawa Timur
Abstrak: Taman nasional merupakan bentuk kawasan lindung yang memiliki fungsi sebagai pelindung unsur ekologi dan sistem penunjang kehidupan, pelestarian keanekaragaman plasma nutfah dan pelestarisa pemanfaatan sumberdaya alam. Upaya pengelolaan taman nasional dalam mewujudkan sistem perlindungan sumberdaya alam dan lingkungan alaminya tidak mudah untuk dilaksanakan. Tekanan terbesar terhadap taman nasional muncul dari masyarakat di sekitar kawasan. Taman Nasional Meru Betiri (TNMB) seperti yang dilaporkan Kuswanto (1984) dan Mujenah (1993) mengalami tekanan yang cukup besar dari masyarakat sekitar kawasan berupa pemungutan tumbuhan Cobat, satwa liar terutama burung, kayu bakar, madu, rotan dan bambu. Kegiatan pemungutan sumberdaya alam dari TNMB ini terutama bambu menunjukkan kecenderungan yang makin meningkat mengingat nilai komersil yang dimiliki komoditi hasil hutan ini. Mengingat hal tersebut diperlukan suatu bahan untuk menyusun kebijakan kedepan tentang upaya pengelolaan TNMB terhadap permasalahan pemungutan bambu untuk menjamin tercapainya fungsi konservasi dari taman nasional. Penelitian ini bertujuan untuk mengetahui latar belakang dan motivasi kegiatan pemungutan bambu dalam TNMB, melihat pola-pola pemungutan bambu dalam kawasan TNMB, melihat dampak terhadap aspek kesejahteraan pemungut bambu dan ekosistem TNMB, dan memperoleh data-data Juntuk melihat proyeksi perkembangan pemungutan bambu dalam kawasan TNMB. Sumber Penelitian dilakukan dalam kawasan TNMB dan empat desa penyangganya di wilayah Dati II Jember, yaitu: Desa Andongrejo. Desa Curahtakir, Desa Curahnongko dan Desa Sanenrejo. Pengambilan data di lapangan pada pertengahan April- pertengahan Juni 1998. Data dikumpulkan dengan menggunakan metode survei melalui teknik wawancara berstruktur dan bebas, metode observasi dan studi literatur. Responden diambil dari masyarakat pemungut bambu. pemilihan responden secara purposive sampling dengan intensitas sampling 35% dari total pemungut bambu yang diperoleh dengan teknik snowball. Data dianalisis secara kuantitatif deskriptif ...
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