Explanation
The certificate authority (CA) is a trusted third party that attests to the identity of the signatory, and reliance will be a function of the level of trust afforded the CA. A digital signature would provide a level of assurance of message integrity, but it is a three-party exchange, including the CA. Digital signatures do not require encryption of the message in order to preserve confidentiality.

Explanation
A board of directors should establish the strategic direction of the program to ensure that it is in sync with the company's vision and business goals. The board must incorporate the governance program into the overall corporate business strategy. Drafting information security policies is best fulfilled by someone such as a security manager with the expertise to bring balance, scope and focus to the policies. Reviewing training and awareness programs may best be handled by security management and training staff to ensure that the training is on point and follows best practices. Auditing for compliance is best left to the internal and external auditors to provide an objective review of the program and how it meets regulatory and statutory compliance.

Section: INFORMATION SECURITY PROGRAM DEVELOPMENT
Explanation

Business criticality is the degree to which an asset is essential to the success of the business and the extent to which its loss or compromise could have a significant impact on the business. Business criticality is one of the main factors that help to determine the inherent risk of an asset, as assets that are more critical to the business tend to have a higher inherent risk.