The White House Office of Management and Budget yesterday released a memorandum for implementing security measures for "critical software" through a phased approach in the wake of an executive order on improving the nation's cybersecurity. The May 12 executive order directed the National Institute of Standards and Technology to issue guidance on security measures for critical software and for OMB to require agencies to comply with that guidance. According to the Aug. 10 OMB memorandum , much of the software...