Once the data was transferred, the program used to encrypt the files was erased.

This thief doesn't bother to encrypt the files he's stealing, but he takes great care not to leave any trace evidence.

Their tools, wannakey and wanakiwi, are able to recover the key used to encrypt the files if it is still in the computer's memory.

The files will be safe, and multiple copies will be maintained by the service, and - better - you can encrypt the files for security.

They said he encrypted the files and transferred them over the Internet without informing Goldman Sachs.

In fact, the downloaded file was a program executable that encrypted the files on the machine.