Does my contact need Signal? Masha Kolenkina Updated March 22, 2017 20:23 Follow If you want to send private messages or place private calls Yes. Related articles Is it private? Can I trust it? Does your company have access to the message or call? Does it protect my messages from snooping? Do I have to use AES-256, or can I use another cipher, like Serpent? Is there a Browser version? Desktop version? Comments 0 comments Article is closed for comments.