Amany M. Alshawi and  Khaled Alduhaiman,  Utilizing Innovative Techniques to Improve Email Security.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 764 - 768
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/4554.