Dwell Time Home Cybersecurity Dictionary Dwell Time Dwell Time represents the length of time a cyber attacker has free reign in an environment from the time they get in until they are eradicated. Dwell Time is determined by adding Mean Time to Detect (MTTD) and Mean Time to Repair/Remediate (MTTR) and is usually measured in days. It is sometimes referred to as the breach detection gap. Lengthy Dwell Times give attackers more opportunity to access private data, siphon funds, and observe and record user and network behavior as well as to plant secondary malware or APTs. It is a top concern for all organizations since the issue impacts brand reputation and legal repercussions. Related TermsMTTD - Mean Time to DetectIR - Incident ResponseMTTR - Mean Time to Respond/Remediate Share: Seeking Clarity? View the Cybersecurity Dictionary for top terms searched by your peers. Back to the Dictionary How Can We Help? Let us know what you need, and we will have an Optiv professional contact you shortly.