D5 Cyber Essentials Certification D5 Architects are delighted to have been awarded Cyber Essentials certification, a world-leading assurance mechanism to demonstrate to our clients and other stakeholders that the most important basic cyber security controls have been implemented. The scheme provides five security controls that, according to the UK government, could prevent “around 80% of cyber attacks”. D5 Architects passed the requirements of certification, following assessment by IT Governance.