Microsoft Office 365 Vulnerability Could Allow Sidestepping of Email Encryption

"A researcher from cloud and endpoint protection provider WithSecure has discovered an unpatchable flaw in Microsoft Office 365 Message Encryption," reports VentureBeat. "The flaw enables a hacker to infer the contents of encrypted messages."
OME uses the electronic codebook (ECB) block cipher, which leaks structural information about the message. This means if an attacker obtains many emails they can infer the contents of the messages by analyzing the location and frequency of patterns in the m