Privacy Preserving Collaborative Data Mining Using Steganography and Encryption

Data collection is an essential step in data miningprocess. Collecting data of varying nature and still preserving privacy is essential for many applications. Privacy concerns maypreventdirect sharing of data andhow multipleparties collaboratively conduct data mining withoutbreaching data privacy presents a challenge.Cryptography involves converting a message text into anunreadable cipher and steganography embedsmessage into a cover media and hides its existence.Both these schemes are effectivelyimplemented in image files. In this paper an advanced system of encrypting datathat combines the features of cryptography and steganography along with privacy preservation is presented.A case study with medical image is also presented. The details of the person’s medical image along with clinical interpretation is encrypted, stegano and stored in the database. Key based retrieval technique is used to recover the hidden details. The advantage of this scheme is that the stegano can operate on encrypted texts also and hence offers a double layer data protection. Keyword: Privacy Preserving, Data mining,Steganography,Image Encryption