Читать книгу (ISC)2 CISSP Certified Information Systems Security Professional Official Study Guide - Mike Chapple - Страница 79

Offboarding is the reverse of this onboarding process. Offboarding is the removal of an employee's identity from the IAM system once that person has left the organization. But offboarding can also be an element used when an employee transfers into a new job position at the same organization, especially when they are shifting between departments, facilities, or geographic locations. Personnel transfers may be treated as a fire/rehire rather than a personnel move. This depends on the organization's policies and the means they have determined to best manage this change. Some of the elements that go into making the decision as to which procedure to use include whether the same user account will be retained, if their clearance will be adjusted, if their new work responsibilities are similar to the previous position, and if a “clean slate” account is required for auditing purposes in the new job position.

When a full offboarding is going to occur, whether as part of a fire/rehire transfer, a retirement, or a termination, this can include disabling and/or deleting the user account, revoking certificates, canceling access codes, and terminating other specifically granted privileges. It is common to disable accounts of prior employees in order to retain the identity for auditing purposes for a few months. After the allotted time, if no incidents are discovered in regard to the ex-employee's account, then it can be deleted from the IAM completely. If the account is deleted prematurely, any logged events that are of a security concern no longer point to an actual account and thus can make tracking down further evidence of violations more complicated.

An internal employee transfer should not be used to move a problem employee into a different department rather than firing them. Consider the overall CIA and benefit to the organization; if a person is not acceptable as an employee in one department, is it realistic to assume they would be in another? Rather than passing around the problem, the better option is to terminate the problematic employee, especially if direct training and coaching does not provide a resolution.

The offboarding process may also include informing security guards and other physical facility and property access management personnel to disallow entry to the ex-employee in the future.

The procedures for onboarding and offboarding should be clearly documented in order to ensure consistency of application as well as compliance with regulations or contractual obligations. Disclosure of these policies may need to be a standard element of the hiring process.

When an employee must be terminated or offboarded, numerous issues must be addressed. A strong relationship between the security department and HR is essential to maintain control and minimize risks during termination.

Terminations are typically unpleasant processes for all involved. However, when well planned and scripted, they might be elevated to a neutral experience. The intent of a termination policy is to reduce the risk associated with employee termination while treating the person with respect. The termination meeting should take place with at least one witness, preferably a higher-level manager and/or a security guard. Once the employee has been informed of their release, they should be reminded of the liabilities and restrictions placed on the former employee based on the employment agreement, NDAs, and any other security-related documentation. During this meeting, all organization-specific identification, access, or security badges as well as devices, cards, keys, and access tokens should be collected (Figure 2.1). The termination of an employee should be handled in a private and respectful manner. However, this does not mean that precautions should not be taken.

For nonvoluntary terminations where there is a perceived risk of a confrontation, the termination process may need to be abrupt and attended by security guards. Any need to resolve HR issues, retrieve company equipment, review NDAs, and so forth can be handled afterward through an attorney.

For terminations that are expected to be professional as well as for voluntary separations (such as quitting, retiring, or taking extended leave), an additional process may be added known as an exit interview. An exit interview is normally done by an HR person who specializes in those interviews with the idea of learning from the employee's experience. The purpose of an exit interview is to understand why the employee is leaving, what their perspective is of the organization (its personnel, culture, process, etc.), and what they suggest could be done to improve conditions for current and future employees. Information learned from an exit interview may assist the organization with retaining employees through employment improvements and process/policy changes.

Whether an abrupt termination process is used or a cordial process was concluded, the now ex-employee should be escorted off the premises and not allowed to return to their work area without an escort for any reason.

FIGURE 2.1 Ex-employees must return all company property.

The following list includes some other security issues that should be handled as soon as possible:

 Remove or disable the employee's user account at the same time as or just before they are notified of being terminated.

 Make sure the employee returns any organizational equipment or supplies from their vehicle or home.

 Arrange for a member of the security department to accompany the released employee while they gather their personal belongings from the work area.

 Inform all security personnel and anyone else who watches or monitors any entrance point to ensure that the ex-employee does not attempt to reenter the building without an escort.