Abstract. We address the key questions on security and trust in Internet communications by using a synthetic approach that connects technological and human aspects of the subject. As first, a brief outline of the Internet security technology is given. This serves as a ground for the exposition of the general concepts and principles, like the security pillars and the security threats. The achieved solutions provide the basis for building of the user trust. The trust is then proportional to the user’s perception of the achieved security level. The omnipresence of Internet in all human activities today, including financial transactions, e-commerce, trade, auctioning, and other, proves by itself that the trust of majority of online users is won. The mechanisms of user protection provided by online service companies are improving, as well as the overall legal support. The general efforts to educate the Internet community and to provide the relevant statistics are on a rise.