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Registry operator policy restricts the maximum outstanding expiration period for domain objects and email forwarding objects to ten years . This type of insurance policy insures an official against claims made by third parties , alleging negligence in the performance of , or the failure to perform professional services . Beyond applying encryption applications to all laptops and other mobile devices , he said that building and enforcing aggressive security policies is the most effective way to improve a company 's standing . Topics include : a threat overview , national computer security policies , an overview of the National Institute of Standards and Technology and the National Computer Security Center , physical security considerations , microcomputer security considerations , introduction to risk assessment , qualitative risk assessment , quantitative risk assessment , other risk assessment methodologies , contingency planning , design reviews and system tests , and security certification and accreditation .