Software-Defined Security

What Does Software-Defined Security Mean?

Software-defined security (SDS) is a type of security model in which the information security in a computing environment is implemented, controlled and managed by security software.


It is a software-managed, policy-driven and governed security where most of the security controls such as intrusion detection, network segmentation and access controls are automated and monitored through software.

Techopedia Explains Software-Defined Security

Software-defined security is typically implemented in IT environments that have minimal or no hardware-based security dependence, such as cloud computing and virtualization infrastructures. Each new device created within the environment is automatically covered and controlled under the base security policy. This also ensures that the security reach and scalability of the underlying environment moves with the increasing infrastructure/environment resources. Moreover, being software-defined and managed security, environments can be moved or migrated within other data center/IT facilities without affecting the security policy and controls in place.


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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.