Defense in Depth (DiD) refers to
an information security approach in which a series of security mechanisms and controls are thoughtfully layered throughout a computer network to protect the confidentiality, integrity, and availability of the network and the data within
.
What is defense in depth and why is it important?
Defense in depth helps
you ensure that you are protecting your systems as effectively as possible
. It forces you to account for security even when your various tools and solutions have been compromised. … By building in layers of security, you can reduce the chance of a single point of failure occurring in your systems.
What is the basic principle of defense in depth?
Defense in depth is a straightforward principle:
imagine your application is the last component standing and every defensive mechanism protecting you has been destroyed
. Now you must protect yourself. For example, if you expect a firewall to protect you, build the system as though the firewall has been compromised.
Why do we need defense in depth?
Creating defense in depth by
segmenting the network helps to ensure that your organization’s most sensitive data is kept isolated
(and thus more secure). It also helps you enforce a policy of least privilege by keeping sensitive systems separate from the ones that users who lack access can use.
What are the layers of defense in depth?
- Physical controls. Physical controls are anything that physically limits or prevents access to IT systems. …
- Technical controls. …
- Administrative controls. …
- Example.
What is an example of DiD defense-in-depth?
One example of effective defense-in-depth layers would include these types of security tools and solutions:
Firewalls
are software or hardware appliances that control network traffic through access or deny policies or rules. These rules may include black or whitelisting IP addresses, MAC addresses, and ports.
What is the difference between layered security and defense-in-depth?
Security in Depth would be closer to
a multifaceted strategic plan
where layered security would be one aspect of defense. Defense in Depth is concerned with more than just the immediate intrusion but also assumes a broader and more variable source of defense.
What are the 7 layers of security?
- Information Security Policies. These policies are the foundation of the security and well-being of our resources. …
- Physical Security. …
- Secure Networks and Systems. …
- Vulnerability Programs. …
- Strong Access Control Measures. …
- Protect and Backup Data. …
- Monitor and Test Your Systems.
What is security design principles?
This principle states that
the application must be secure by default
. That means a new user must take steps to obtain higher privileges and remove additional security measures (if allowed)
What is multilayered defense?
Multi-layered security refers to
a security system that uses numerous components to shield multiple levels or operational layers
. The term can also refer to the term “defensive depth,” which is based on slightly different ideas, many of which are used to mitigate threats, delay or prevent threats.
What are the 3 key layers of the defense in depth security strategy?
Defense-in-depth cybersecurity use cases include
end-user security, product design and network security
.
Why is it important to have multiple layers of defense?
These layers work together to tighten security and have a better chance of stopping intruders from breaching your networks than using a single security solution. Having multiple layers of security in place is crucial to
protect data at all levels
and across multiple applications and devices.
What is a benefit of deploying a defense in depth strategy?
Defense in depth (also called layered defenses) applies multiple safeguards (also called controls, measures taken to reduce risk) to protect an asset. Any single security control may fail; by deploying multiple controls, you
improve the confidentiality, integrity, and availability of your data
.
What are the 3 elements of layered security?
Layered security, as in the previous example, is known as defense in depth. This security is implemented in overlapping layers that provide the three elements needed to secure assets:
prevention, detection, and response
.
What is network perimeter defense?
Perimeter defense is
one level of defending your network from attacks
, and it works wonderfully to protect as a firewall from external attacks. Perimeter defense is just part of the protection suite. Defense in depth means that several layers of security protect your network and its data, like Russian nesting dolls.
Who invented defense in depth?
Edward Luttwak
used the term to describe his theory of the defensive strategy employed by the Late Roman army in the 3rd and 4th centuries AD.
