How to organize secure transmission of secret data over the Internet?

Question

Computer networks

Hello, how to organize a secure transfer of "secret data" over the Internet between two organizations that have entered into an agreement for joint development.

Answer 1

secure channel between network points - VPN
secure file exchange - already mentioned gpg plus mail.
secure access to the resource - SSL.
Yes, a bunch of them, defense mechanisms. What exactly do we protect?

Answer 2

One-time transfer - winrar with a password, encrypted disk (truecrypt, or equivalent), and the password itself separately.
Regular - set up an encrypted VPN tunnel and send files through it.
letters - gpg encryption, but vpn is better.

Answer 3

gpg

Answer 4

GPG with a long key will help you.

Answer 5

If the data is classified as "Secret", then you need cryptorouters of at least KB2 level. Raise a cryptotunnel between them. They cost a lot of money