Quick Definition
Employee Substitution refers to the unauthorized provision of an authorized employee's credentials to another employee or to a third party, in order to enable this other individual to perform everday work.
This practice creates security risk by preventing correct attribution and by providing secure system access to parties other than those who have been authorized to use the system. Regrettably common in remote-working or contract work scenarios, employee substitution often leads to situations in which effective strangers work inside a company's security perimeter for extended periods of time without detection.