期刊名称：International Journal of Computer Technology and Applications
电子版ISSN：2229-6093
出版年度：2013
卷号：4
期号：1
页码：43-50
出版社：Technopark Publications
摘要：Dual Key Triple Encryption Text Based Message Using Cryptography and Steganography is a modular encryption and decryption method for any type of file. It combines layer 1 and layer 2 encryption techniques with standard encryption like AES as layer 3 encryption. Dual symmetric key is required to encrypt or decrypt file, so it can be used by two different persons to encrypt or decrypt certain file. Layer 1 and Layer 2 can use independently to achieve higher security level and fast encrypt or decrypt processing time. We propose character mapping and window addition for level 1 encryption. This technique has better processing time more than 21 times faster than fair character mapping. For layer 2 encryption, we propose scrambling transpose position and dummy file insertion as steganography technique. This method has higher efficiency ratio compare to LSB technique. We can achieve 50% efficiency compare to 12.5% in LSB technique. Combining both methods, we can achieve higher security level by maintaining faster processing time and reduce chipper text size. It can also be used together with AES to increase security level, yet still maintaining fast overall processing time and high efficiency ratio.
关键词：Dual Key; Encryption; Decryption; Cryptography; Steganography; Character; Window addition; Scrambling; Insertion; fast processing; high efficiency and AES
