Principles of Secure Design 1. In a zero trust architecture, inherent trust is removed from the network. In the previous principles we talked about building trust in a user’s identity, their devices and services. It may be acceptable to allow cases where the number of possible functions that may be called is larger than one, provided it does not affect the precision of the code analysis itself. When choosing which technologies to use for your zero trust architecture, evaluate the signals that are available and capabilities of your policy engine. This means more components, more processes and more security measurements involved. The first part of this layered approach begins with the identification of critical assets. The first, which has already been mentioned, is the packet-filtering firewall. Often, it will be easier to comply with the rule than to explain why non-compliance is acceptable. Use mutual authentication wherever possible. It is easier to upgrade small pieces of a system than huge blobs. For example, a visitor can see the lunch menu, or a contractor can only access documents related to their work. Implications: Make security design modular and flexible from the start. Therefore, system engineers, architects, and IT specialists should implement security measures to preserve, as needed, the integrity, confidentiality, and availability of data, including application software, while the information is being processed, in transit, and in storage. The protocol should be capable of authenticating itself. In security architecture, the design principles are reported clearly, and in-depth security control specifications are generally documented in independent documents. To enable granular access control, create specific roles for each user. Statement: Use unique identities to ensure accountability. The first part of this layered approach begins with the identification of critical … Existing laws and regulations require the safeguarding of security and the privacy of data, while permitting free and open access. Rationale: Authentication is the process where a system establishes the validity of a transmission, message, or a means of verifying the eligibility of an individual, process, or machine to carry out a desired action, thereby ensuring that security is not compromised by an untrusted source. Determining if the device accessing your services is up-to-date, compliant with your device configuration policies and in a healthy state is important as these represent some of the most important signals used to control access to services and data. Statement: Do not implement unnecessary security mechanisms. Rationale: Security design should protect against services use of other layers or applications (also SAAS services). Align Security Priorities to Mission – . Statement: Defense in depth should be a key architecture and design principle. In cases where the sensitivity or criticality of the information is high, organizations may want to limit the number of systems on which that data is stored and isolate them, either physically or logically. To work effectively, security controls often depend upon the proper functioning of other controls. The policy is then applied to all aspects of the system design or security solution. Requests between services also need to be authenticated. Rationale: Multi-layered security controls and practices are better than single defense layer. OSA is a not for profit organization, supported by volunteers for the benefit of the security community. Cybersecurity Best Practices for Telemedicine, What are PIPEDA’S Breach Notification Requirements. Rationale: In computing systems, the save default is generally “no access” so that the system must specifically grant access to resources. Identity is a wide-ranging topic and needs careful consideration as it’s a foundational service for zero trust architectures. Rationale: A mechanism that, in the event of failure, responds in a way that will cause no harm, or at least a minimum of harm, to other devices or danger to personnel. Primacy of Principles. Rationale: Pointers are easily misused, even by experienced programmers. If you have any questions about our policy, we invite you to read more. Host firewalls protect hosts as their name implies. Defense-in-depth as a cybersecurity strategy takes a similar holistic approach to defense, rather than a specific one-to-one control vs. threat style. Rationale: Security must be considered in information system design. This is a free framework, developed and owned by the community. Just because you’re connected to a network doesn’t mean you should be able to access everything on that network. Pointer dereference operations may not be hidden in macro definitions or inside typedef declarations. To properly secure a network and its assets, a layered approach is preferred. Similarly, if an erroneous value of an object has to be diagnosed, the fewer the number of statements where the value could have been assigned; the easier it is to diagnose the problem. About This Blog. Best practice suggests it is better to have several administrators with limited access to security resources rather than one person with “super user” permissions. Device health consists of compliance with device configuration and device state. This will also help when accessing other organisation’s services and data. Level 7, or application layer, firewalls are also known as an application or application-level proxy firewalls. ACLs should also reflect this. First, define policies which configure devices to be secure, NCSC’s end-user device guidance can help. 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