[Cryptography] ? recommendations for secure communications

[Ralf Senderek]

On Thu, 12 Oct 2017, John Denker via cryptography wrote:

> Can email be secured in a reasonable way for ordinary
> non-wizard users, or has everybody given up on this?

No, I haven't. https://crypto-bone.com

[...]

> Favorite maxim:
>  Metadata is data.
>  A cryptosystem that leaks metadata is a cryptosystem that leaks.

The Crypto Bone leaks the information that A has sent an encrypted
message to B via ordinary email.

     --ralf