Learn about Secure Electronic Transaction (SET) in this comprehensive video covering essential aspects of network security. Explore SET services including confidentiality, integrity, and authentication for both cardholders and merchants. Discover the roles of key participants such as cardholders, merchants, issuers, acquirers, certificate authorities, and payment gateways. Understand the three main SET transactions: purchase request, payment authorization, and payment capture. Delve into advanced concepts like dual signature and true signature to gain a thorough understanding of how data is protected in electronic transactions.