A web application security requirement stated that it must not behave differently under similar circumstances and should promise a consistent functionality even when overloaded or a tampering is attempted. The requirement is of:

Integrity refers to safeguarding the accuracy and completeness of assets and ensuring consistent, unaltered behavior under various conditions, including tampering or overload. Confidentiality ensures data privacy, availability ensures uptime, and accountability tracks actions; none of these directly define the requirement for consistent functionality under tampering.