What is Trojan?

Within the context of cybersecurity, a Trojan describes any type of malware which disguises its true intent in order to gain unauthorized access to a target device or network. In most cases, trojans are designed to look like an innocuous program or are discretely attached to another piece of software a target is likely to install. Once a trojan has infiltrated its target it is free to execute its malicious code, which in most cases will damage, steal from, or otherwise disrupt the target device or network.