Data Hiding Technique Depended on Pseudorandom Sequences

Z. Wai, S. Than

Abstract: Due to increasing the technologies, security is very important in many areas. Steganography and Cryptography are two popular ways of sending vital information in a secret way. In this proposed system, an image steganographic technique is presented by combining cryptographic and steganographic techniques. In this proposed scheme, secret messages are encrypted before embedding it into the cover image which gets high security to secret data. RC4 algorithm is used to encrypt secret messages and LSB based data embedding technique is used to hide encrypted messages. To hide encrypted messages into BMP image file, pseudorandom sequences are used. These sequences are generated by BBS (Blum Blum Shub) Pseudorandom Number Generator. In this method, message may be embedded to 1-LSB of container image if random sequence generates ?1? as PRNS. In contrast, the message can be embedded to 2-LSB of container image. If an attacker wants to get the original messages, he must know secret key and random sequences. This proposed system intends for data confidentiality and data integrity. This proposed model gives two tier securities to secret data. This can be used for many applications in computer science and other related fields.

Keywords: BBS, random sequences, RC4, security, steganography