E-NET MODELS OF A SOFTWARE SYSTEM FOR WEB PAGES SECURITY Nikolai Todorov Stoianov, Veselin Tsenov Tselkov Abstract: This paper presents solutions for cryptography protection for web pages. The solutions comprise the authors’ experience in development and implementation of systems for information security in the Automated Information Systems of Bulgarian Armed Forces. The architecture, the models and the methods are being explained. Keywords: computer security, information security, web pages, web security. 1. INTRODUCTION With the increase of the possibilities of Internet/Intranet services and their daily use in the corporative information systems the problem of the information security is being very topical. One of the most frequently used services is access to web pages. The advantages of using it are:  easy to use;  comparatively inexpensive;  very popular. Except for these advantages this service also has many disadvantages:  usually attacked by hackers;  everyone could print and copy pages;  lack of security communication;  there is no strict identification and authentication on web server. Some of the existing solutions of the web security are:  using the software system for public key information security;  MS Internet Explorer, Netscape Navigator, etc.;  Using SHTML;  integration of digital certificate in web software (Baltimore, Microsoft, Netscape, Entrust etc.) [1,2,3]. These means give the opportunity to use widespread software such as MS Internet Explorer, MS Word, MS Excel. But it is not possible to:  control access to all web pages;  cipher pages;  keep logs;  analyze the state of the page;  generate reports for accomplished actions. Consequently it is necessary to create a software system for web security which should use all positive characteristics of this service, and to eliminate the disadvantages related with the information security.