In the context of digital messaging $($Bob sending a digital message to Alice$),$ integrity means:

When Alice receives a message from Bob, she can be reasonably certain that the message has not had its contents changed in transit

Alice can only read the message from Bob if she can decrypt it$.$

The message Bob sent to Alice is guaranteed not to contain any malicious links or viruses.

When Alice receives a message from Bob, she can be reasonably certain that the message was created by Bob.