To decrypt a message encoded with the Enigma machine, for example, a recipient needed a key sheet that revealed the initial encryption settings.

Apple is upgrading iMessage's security to post-quantum cryptography in an effort to avoid future "harvest now, decrypt later" attacks.

Apple plans to patch the issue in iOS 9.3, due for release on Monday Apple’s iMessage system has a cryptography flaw that allowed researchers to decrypt a photo stored in iCloud, the Washington ...