The number of individuals whose fingerprints were stolen is 5.6 million up from 1.1 million. Theoretically criminals could devise a way to use the fingerprint records as authentication in systems where fingerprints are used as biometric identifiers. OPM and the Department of Defense have been double-checking their assessment of what was stolen in the breach discovered in April and found that the previously announced 1 million affected individuals was inaccurate. The working group is preparing to mail letters notifying those individuals whose records have been compromised.”]