1. Din A (2002) Optimization and forecasting with financial time series. Paper presented at the Note from Seminar at CERN
2. Dorothy E, Denning R (1983) Cryptography and data security. addison wesley publishing company, inc., Boston
3. Lane V (1988) Security of computer based information system. Macmilln Education LTD, London
4. Johnson NF (2001) Information hiding steganography and watermarking attacks and countermeasures. Kluwer Acdemic Publishers, Berlin
5. Benjamin B, Santiago G, Victor B (2001) Steganographic watermarking for documents. In: Proceeding on the 34th Hawaii International conference on system science