<p class="Abstrak">Informasi merupakan hal yang sangat berharga. Saat informasi atau data jatuh ke tangan yang tidak bertanggung jawab, maka akan menjadi bencana bagi pemiliknya. Berbagai macam cara dilakukan untuk melindungi data atau informasi. Teknik pengamanan data atau informasi telah berkembang dengan sangat pesat. Proses pengamanan pesan yang banyak beredar diataranya dengan menggunakan kriptografi dan steganografi. Dua teknik ini merupakan teknik yang berbeda maksud dan tujuannya. Kriptografi bertujuan untuk mengacak pesan supaya sulit dibaca oleh pihak yang tidak berkepentingan. Sedangakan steganografi bertujuan untuk menyembunyikan pesan.</p><p class="Abstrak">Pada penelitian ini akan menggabungkan teknik kriptografi metode AES dengan teknik steganografi metode <em>gifsuffle</em>. Teknik kriptografi metode AES akan digunakan untuk merubah data atau informasi yang berbentuk <em>plain</em>-<em>text</em> menjadi <em>cipher</em>-<em>text</em>. Selanjutnya <em>cipher</em>-<em>text</em> tesebut akan disembunyikan ke dalam gambar berformat gif dengan metode steganografi <em>gifsuffle</em>. Metode <em>gifsuffle</em> akan dikombinasikan dengan algoritma huffman untuk memperbanyak pesan yang dikirimkan.</p><p class="Abstrak">Penelitian ini berhasil menggabungkan metode kriptografi AES dengan metode steganografi <em>gifsuffle</em>. Hasil pengujian <em>imperceptibility</em> menunjukkan 85% responden tidak dapat membedakan gambar asli dengan gambar yang telah disisipi pesan. Pemisahan gambar dengan pesan dapat dilakukan dengan akurasi 100% dan proses dekripsi pesan cipher-text menjadi plain-text juga dapat dilakukan dengan sempurna.</p><p class="Abstrak"> </p><p class="Judul2"><strong><em>Abstract</em></strong></p><p class="Abstract"><em>Information is a very valuable thing. When information or data falls into irresponsible hands, it will be disastrous for the owner. A variety of ways are done to protect data or information. Data security techniques have grown very rapidly. The process of securing a message that many circulated diataranya by using cryptography and steganography. These two techniques are different techniques of purpose and purpose. Cryptography aims to randomize messages to be difficult to read by unauthorized parties. While steganografi aims to hide the message.</em></p><p class="Abstract"><em>In this research combine AES cryptographic method and with gifsuffle steganography method. AES method will be used to convert data or information in the plain-text form into cipher-text form. Furthermore, the cipher-text will be hidden into gif-format images with gifsuffle steganography method. The gifsuffle method will be combined with the huffman algorithm to multiply the transmitted data.</em></p><p class="Abstract"><em>This research successfully combined AES cryptography method with gifsuffle steganography method. Imperceptibility test results show 85% of respondents can not distinguish original images with images that have been inserted data. Separation of images with data can be well done and the accuration reach 100%. Process of decrypting cipher-text into plain-text can also be done perfectly.</em></p>
Red Beetroot Tubers have the benefit of providing a natural colour in the manufacture of food products. In the red beetroot fruit, there is the pigment betacyanin which is a derivative of betalain. Betasianin is a red or violet pigment which is a group of polar flavonoids because it binds to nitrogen pigment sugars and is a substitute for anthocyanins. The purpose of this study was to determine which red beet tuber ethanol extract face serum formula (Beta vulgaris L.) was the best, based on the results of the physical evaluation (organoleptic, pH, dispersion, viscosity, homogeneity), proving the presence of antioxidant content based on qualitative testing using KLT and specific spotting (DPPH 0.4%) in each formulation. The result of this study is that the content of secondary metabolites of red beetroot tuber extract (Beta vulgaris L.) positively contains flavonoid compounds, alkaloids, quinones, saponins, and flavonoids, based on the results of the physical evaluation (organoleptic liquid textured and brownish-yellow in colour, pH (5.00), dispersion power (5.5), viscosity (1997), homogeneity test with homogeneous results and based on qualitative antioxidant activity tests using Thin Layer Chromatography and spotting appearance specific (DPPH 0.4%) is F2 because it has a more pronounced yellow spot colour against the background of a purple colour plate, this means that the red beet tuber face serum preparation contains a class of antioxidant compounds. So it can be concluded that the best formula is formula 2 because it has good dosage characteristics and is suspected to contain antioxidant compounds based on qualitative analysis
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