No one but the recipient of the message can read the
content, because each message is encrypted one-way for
the end user. No one else has the same key to decrypt
it.Messages are encrypted on the sender's computer and
enter the network already encrypted, and only the
recipient can decrypt it on his computer. Cryptography
is so arranged that only the recipient with the cipher
can read this message, there can be no other loophole
mathematically.