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The term that accurately describes the software designed to identify and protect against Trojans and other types of malware is Anti-Trojan software. This type of software specifically targets malicious programs that masquerade as legitimate applications, like Trojans, which are known for their deceptive nature.

Anti-Trojan software often includes capabilities to scan for known malware signatures, monitor system behavior for suspicious activities, and remove or quarantine any identified threats. Its primary focus is on malware detection and the protection of systems from malicious attacks.

While firewalls are essential for monitoring and controlling incoming and outgoing network traffic based on predetermined security rules, they do not specifically identify or remove malware. An Intrusion Detection System detects unauthorized access or anomalies within a network but is not primarily focused on malware detection and prevention. Encryption tools are used to secure data, ensuring that it cannot be accessed by unauthorized users, but they do not deal with malware protection. Therefore, Anti-Trojan software is the most appropriate term in this context.