Threats to Data integrity in Director of National Intelligence's "Worldwide Threat Assessment."
Cyber is number one and read this:
Most of the public discussion regarding cyber threats has focused on the confidentiality and availability of information […] we might also see more cyber operations that will change or manipulate electronic information in order to compromise its integrity (i.e. accuracy and reliability) instead of deleting it or disrupting access to it.
https://www.schneier.com/blog/archives/2015/03/threats_to_info.html