Judul: Electronic power of attorney by using digital signature algorithm
Abstrak: The protocol of electronic power of attorney is an online form of a power of attorney with paper media. Signatures used in electronic power of attorney is a digital signature. Digital signature algorithm used is the Digital Signature Algorithm (DSA). The scopes of this research are: 1) the protocol of electronic power of attorney that will be made, including an unstamped under the counter power of attorney, 2) created Protocol doesn’t include the protocol of online submission form of power of attorney to the tax officials, 3) there are two Digital signatures made, endorser and endorsee. The method of this research consists of several processes, the problem analysis, literature review, the making of electronic mail protocols, simulation making and security analysis. The protocol of electronic power of attorney is adapted to the making conditions of a power of attorney in Indonesia. The power of attorney is generally composed of the identity of endorser and endorsee, power transfer, and the signature of endorser and endorsee. It is assumed that in this study there has been a protocol of online form application of power of attorney to the tax man. This application form is in the form of watermarked file as a replacement of stamp. Power of attorney file is signed twice with DSA. The endorser made a power of attorney, signed and sent it to the endorsee. The endorsee verified the power of attorney. If it was appropriate, the endorsee signed it. The endorsee then run the command in accordance with the contents of a power of attorney. The power of attorney was taken to a third party. The third party verified the signature of endorser and endorsee. The simulation of electronic power of attorney protocol is built using Java programming language. The software used is Netbeans IDE 7.0.1. DSA which was taken from a java library and the hash function used is SHA1. From the simulation, the security of protocols can be ensured. The safety criteria which are fulfilled are the integrity of a power of attorney contents can be guaranteed, and the signature of endorser and endorsee can certainly be made by the person concerned. This research was carried out only by making electronic power of attorney protocol. This study does not include protocol of stamp replacement and notary. Power of attorney which has a powerful position in Indonesian law is a letter which is signed in front of a notary or signed by a notary, and stamped.
Keyword: Digital Signature Algorithm (DSA), java, protocols, electronic power of attorney

Judul: Protokol Keamanan Dokumen Digital pada Sistem E-Procurement menggunakan AES, RSA, dan SHA1
Abstrak: Digital signature is an authentic evidence and also has a function like a signature on the printed document, but its use in digital documents. Documents that was sent through the internet, should be ensured their source and destination. This research is decided to implement a security protokol on file transfer process on e-procurement system using AES, RSA, and SHA1 algorithm. Data used in this research is a compressed digital document with ZIP format. The result of this research indicate that the system has been created already capable of generating and verify digital signature. The security services that owned by this system such as confidentiality, entity authentication, data origin authentication, integrity, and non repudiation. The testing process is performed on these security services including confidentiality test, authentication test, integrity test, and non repudiation test. Confidentiality is guaranteed by the encryption process using AES algorithm. In addition, authentication, integrity, and non repudiation service is guaranteed by the digital signature mechanism.
Keyword: Bogor Agricultural University (IPB), tender, digital signature, E-Procurement

Judul: Infeksi Clostridium perfringens pada unggas dan cara - cara penanggulangannya
Abstrak: Clostridium perfringens atau disebut juga C. welchii adalah salah satu mikroba yang dapat menyerang unggas terutama ayam broiler dan kalkun yang dipelihara secara intensif dengan sistem litter. Kejadiannya bersifat sporadis dan merupakan masalah yang cukup besar, karena angka kematian unggas dapat mencapai 60 %. Clostridium perfringens adalah bakteri berbentuk batang dengan ukuran 0.9-1.3 x 3.0-9.0 mikrometer, tunggal atau berpasang-pasangan dan jarang membentuk rantai. Kuman yang bersifat Gram labil ini dapat membentuk spora yang terletak sentral atau sub terminal. Kuman ini tumbuh baik pada media agar darah, dalam suasana anaerob. Daya tahannya terhadap pemanasan ialah 2 jam pada suhu 100..°C atau akan rusak pada pemanasan dengan suhu 120 °C selama 20 menit. (Bergey, 1975). Secara normal C. perfringens terdapat dalam saluram pencernaan manusia maupun hewan, termasuk unggas. Pada saluran pencernaan unggas kuman ini terdapat dalam caecum dan usus besar, tetapi jarang pada usus kecil. ...
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