Think of a secret known only to you and your contact. Do not use the same Internet connection to exchange the secret. Enter the secret, then wait for your contact to enter it. If the secrets do not match, the communication channel you are using may be under surveillance.
Think of a secret known only to you and your contact. Do not use the same Internet connection to exchange the secret. Enter the secret, then wait for your contact to enter it. If the secrets do not match, the communication channel you are using may be under surveillance.