Related to information security, the guarantee that the message sent is the message received with...

Integrity is the guarantee that the message sent is the message received, and that the message was not intentionally or unintentionally altered.

Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 60.