The site has a simple structure: - Forums → Forum → Topic → Post - Forums → Users - User profile → Private messages → Exchange password Forums contain topics, topics consist of posts. All topics have own passwords, all posts are encrypted. Depending on the options, the forum can also have own password to encrypt the names of its topics. The author of the post can delete his post, the topic starter can delete any post in his topic and the topic itself, the forum creator can delete any post or topic in his forum and the forum itself. The administrator can delete any post, topic or forum. The function of restricting the rights of users and guests to view, read and write on forums and topics is supported. The module "Users" displays the numbers of all registered members to set permissions for specific users in the corresponding section. The module "User profile" enables to change own password for logging into the application, as well as move to the module "Private messages", where members can exchange their password for a topic or forum between themselves. Short links to topics are allowed, for example, http://cryptbb.us.to/forum/?t=2 In this case the application automatically redirects from the main page of the forum to the topic with number 2. While the user registers and logs in, the redirect is kept. The administrator can prohibit members from creating the new forums and topics with an unencrypted titles. He can enable the premoderation of the user names. The administrator can also define an invitation code, which is required for registering new users, and announce this code to the desired guests, for example, http://cryptbb.us.to/forum/reg/?i=123456 In addition, for increased safety, offline tools were developed for generating a random password, creating keys and also for encrypting and veilizing a message. Attaching an encrypted file to a post was implemented. BB-codes and smileys are supported.