Foldering

Due to its reliance only on the decentralized Internet rather than a specific communications network that may be watched and sabotaged, email has always been a useful prospective method of conveying secret information since the invention of the Internet. Emails used to be a reliable form of communication, but as counterespionage technology improved in tracking them, it has become nearly impossible.

While it might appear that there is no way to address the issue, there is; simply store the email as a draft instead of sending it. Since quite some time, operatives, particularly terrorists, have been observed using this method to successfully send and receive messages, and counterterrorism experts claim that it is highly challenging to disrupt. There is no digital signature left behind that may be used to identify the sender or recipient of the message. The messages in the drafts could even be further encrypted using obscure, cryptographic languages.