As the technology and information develops, the greater the risk or the crime occurs. One of the most common crimes is counterfeiting and hijacking the information sent. Therefore, to maintain the confidentiality of such information requires a technology that can conceal information transmitted, such as cryptography. Based on the key used, the cryptographic algorithm consists of symmetric cryptography and asymmetric cryptography. One example of a symmetric key algorithm is the Advanced Encrypted Standard algorithm and the asymmetric key is Rivest-Shamir-Adleman. In this final project, built a digital image encryption and decryption system to analyze the performance of the two algorithms. Image type used is RGB image with different size. The results obtained in this system is, AES algorithm produce better cipher image but this algorithm require longer processing time compared with RSA algorithm. The performance of both methods is calculated by finding Mean Square Error (MSE) and Peak Signal to Noise Ratio (PSNR) values. From the average value of MSE and PSNR obtained, we found the perfect MSE and PSNR values on the RSA algorithm with MSE = 0 and PSNR = inf.

<span class="fontstyle0">The purpose of this study is to analyze the legal protection of registered cosmetic brands, analyze the obstacles and solutions in the legal protection of cosmetic brands. This study uses a qualitative descriptive research method with a normative juridical approach. The results of this study are the legal protection against counterfeiting of well-known trademarks in Indonesia is regulated by Law Number 8 of 1999 concerning Consumer Protection and Law Number 20 of 2016 concerning Trademarks and Geographical Indications, but because brand protection is still a delict complaint and has not been maximized without a complaint from the brand holder and no sanctions are applied for brand infringement, so that supervision is needed by the Department of Industry and Trade throughout Indonesia in the<br />distribution of goods to traders in order to prevent the circulation of counterfeit goods Obstacles in carrying out legal protection against cosmetic counterfeiting regarding<br />legal regulation and law enforcement, cosmetic brand products that are still widely<br />counterfeited and cheap prices, lack of facilities and facilities that support tools that make it easy to detect an item and fifth, namely the weak awareness of buyers to buy a quality item. The problem solving are such as make regional regulations regarding brand counterfeiting in each region, to suppressing brand counterfeiting by providing socialization to business actors and the public about the dangers of brand counterfeiting, especially those containing ingredients that are harmful to health.</span> <br /><br />