Abstract
Information security can be achieved by different standard methodologies like Steganography, Cryptography and Digital Watermarking. In this research semantic watermarking approach has been used to offer security for online content. The proposed approach uses a secret key based on the idea of public key cryptography. The proposed method is developed by embedding semantic watermarking with a standard cryptographic method.
In the proposed model electronic web content is secured by a secret key. This secret key is composed of a semantic key and a unique author ID which is further encrypted by a cryptographic algorithm. Semantic key is generated on the basis of most frequently repeating letters in English language which are “th” and “wh” and a unique author ID is issued by the certification authority. Resultant of these two is further subjected to another layer of security and the secret key is encrypted using a cryptographic algorithm- Advanced Encryption Standard (AES). The system has been implemented using C# language and is further tested with different popular websites.