Judul: Teknik Steganografi pada Rich Text Format File dengan Memanfaatkan Atribut Warna Teks
Abstrak: Steganography technique is a technique hiding the existence of message using a specific media as a place of insertion of the message. Steganography technique aims to avoid the suspicious of existence of the inserted messages. One of the media used in the technique of steganography is digital text media. In this research, digital text used as insertion of media files such as rich text format. Rich text format files are selected for its ability to accommodate large numbers of messages. The idea that are used to insert the secret message in rich text format files is by using the rich text format compiler attribute. Compiler attributes that is used as a place to insert the message is the color attribute. Results from this study compared the rates of change that occurred in the document size before and after the inserted messages and calculate the maximum capacity of messages that can be pasted into a document in rich text format. A change in the size of the cover-text depends on the size of the inserted messages. The bigger the messages that are inserted, then the size of the cover-text has to get bigger. The maximum message size that can be inserted in a rich text file formats depends on the number of spaces available in rich text file format. In this research, the technique of steganography in rich text format file using a text color attribute is resistant to the process of storage or transmission uses the Internet and the read only by using some word processor applications. However, steganography technique in rich text format file using a text color attribute is not resistant to the process of conversion of files into the form of Portable Document Format (*.PDF) and return the storage process stego-text using word processor applications.
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Judul: Steganografi pada File DNA Berformat Fasta dengan Metode DNA Rekombinan
Abstrak: Steganography is a technique of inserting information into a media. This technique focuses on removing suspicion of storage media messages. Hiding information with this technique usually is performed in media images, sounds, and text documents. Those media are already common for use as storage media messages, which has low capacity and stood by people. This is a problem that will lead to greater suspicion on such media.The solution is then offered to find new media that has a high level of random, hard to understand and has a large capacity. This study discussed the application of steganography in the media Fasta-formatted file of DNA using recombinant DNA. Insertion was done by replacing certain parts of DNA sequences of DNA on file with the message. The message that would be inserted first converted into the form of DNA sequences.The performance of the insertion of messages with recombinant DNA method was tested by analyzing the properties of steganography that were imperceptible, fidelity, recovery and analysis of safety. Testing the quality of a DNA file was done by using BLAST as a tool to determine the similarity of DNA sequences located on the internet. The results showed that the insertion of recombinant DNA method provides a vague presence of a message, to make the process of extracting the message and producing good quality media. Thus steganography in Fasta-formatted file of DNA using recombinant DNA method is a good solution as the new media that has a high level of random.
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Judul: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii