Independent encryption software TrueCrypt is apparently not as secure as many thought. Yesterday (May 28), the TrueCrypt homepage was suddenly replaced with a notification that read WARNING: Using TrueCrypt is not secure as it may contain unfixed security issues. TrueCrypt is used by many security-minded people, including NSA whistleblower Edward Snowden, to turn a storage device, such as a flash drive or hard drive or a partition of such a device, into an encrypted volume, protecting the documents stored in that volume from prying eyes.