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Search Answers Clear Filters. Answers Support MathWorks. Search Support Clear Filters. Vote 0. Answered: Rahanuma Tasnim on 3 Aug Accepted Answer: Andy. Accepted Answer. Andy on 11 May Cancel Copy to Clipboard. AdamG on 11 Sep Not suprisingly, there's a function called bin2dec for that. A file named output. To decode:. Sample Text file:. Steganography is a technique to hide secret messages in a host media called cover media.
The advantage of steganography over cryptography is that messages do not attract attention to attackers and even receivers. Steganography and cryptography are often used together to ensure security of the secret messages. Hiding capacity is very important for efficient covert communications. In addition, the bit stream truncation makes it difficult to hide information. In this project, a high-capacity steganography scheme is proposed based on DCT and which uses bit-plane encoding procedure, where DCT is used to transform original image cover image blocks from spatial domain to frequency domain.
The experimental results show that the algorithm has a high capacity and a good invisibility. Moreover PSNR of cover image with stego-image shows better results in comparison with other existing steganography approaches.
With the development of Internet technologies, digital media can be transmitted conveniently over the Internet. However, message transmissions over the Internet still have to face all kinds of security problems. Therefore, how to protect secret messages during transmission becomes an essential issue for the Internet. Encryption is a well-known procedure for secure data transmission. These methods scramble the secret message so that it cannot be understood.
Steganography differs from cryptography in the sense that where Cryptography focuses on concealing the contents of a message, steganography focuses on concealing the existence of a message. Two other technologies that are closely related to steganography are watermarking and fingerprinting. Therefore, the goal of steganography is the secret messages while the goal of watermarking is the cover object itself.
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