In a pure mathematical attack, (i.e., lacking any other information to help break a cipher) two factors above all count: 1  Computational power available, i.e., the computing power which can be brought to bear on the problem. 2  Key size, i.e., the size of key used to encrypt a message.
OMB's guidance to agencies requires them to report each PII-related breach to DHS's U.S. Computer Emergency Readiness Team (US-CERT) within 1 hour of discovery. However, complete information from most incidents can take days or months to compile; therefore preparing a meaningful report within 1 hour can be infeasible.
Breach. The most significant change to the Breach Notification Rule is the definition of the term breach. HHS defines breach as the acquisition, access, use, or disclosure of PHI in violation of the Privacy Rule that compromises the security or privacy of the PHI.he Privacy Rule requires that covered entities apply reasonable safeguards to all PHI. Thus, even PHI that was protected in accordance with the Privacy and Security Rules, such as by use of firewalls, but was breached under the terms of the new Breach Notification Rule, would have to be reported.