Crypto-sender allows you to achieve privacy while communicating using a mobile device. All sent messages are encrypted. The sender encrypts his message with the public key of the recipient, the recipient decrypts the message with his private key.

In a private smart-contract, only users from your list can send messages to you. In a public smart-contract, you can receive messages from all users of the messenger, even not included in your list.

You can block any unwanted contact at any time and not waste time on annoying interlocutors, the blocking procedure is extremely simplified. The contacts you blocked in Crypto-sender cannot send you messages, etc. If someone from the “black list” needs to be unblocked, then simply find the desired contact in the list, open the menu with a long tap and press “Remove from black list” in it.