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Vpn-service [Doublevpn]

Voice-service, secure ip-telephony, Jabber

About this section:

This section provides a generalized information on existing services, organized in order to provide secure communications users of Private Key Project.

1. XMPP/Jabber

Extensible Messaging and Presence Protocol (XMPP) is a communications protocol for message-oriented middleware based on XML. The protocol was originally named Jabber, and was developed by the Jabber open-source community in 1999 for near real-time, instant messaging (IM), presence information, and contact list maintenance. Designed to be extensible, the protocol has also been used for publish-subscribe systems, signalling for VoIP, video, file transfer, gaming, Internet of Things (IoT) applications such as the smart grid, and social networking services.

1.1 Encryption in XMPP/Jabber

  • In the process of logging in using the mechanism of SASL, where the password itself is not actually transmitted over a communication channel, so the interception of data to enter the user account is practically excluded.
  • In an exchange of messages between users using TLS and SSL, whose work on the servers of PKP provides cryptographic package open source OpenSSL. It should be noted that the various jabber-servers have different security settings, and some of them may not support TLS or SSL. !Therefore, in the inter-server communication messages may be sent in an unprotected form (plaintext)!
  • To exclude the interception of messages in any of the stages of its transmission, it is strongly recommended to use encryption mechanism "point to point", with this mechanism, users exchange public keys which in turn signed by their private keys that provide encryption / decryption private messages directly to the computers of the users. This scheme can be implemented using software from PGP, User settings available in the "Articles".
  • 1.2 Using XMPP/Jabber service from PKP

    In order to start using the XMPP/Jabber service from PKP sufficient register a new account, during the registration process you will be prompted to enter a password, which will serve as a confirmation of the account owner in the PKP. The same password is required to enter the Jabber account from PKP. Jabber-client is available via this link Psi.

    XMPP ID/Jabber ID will be the following :

    2. VoIP-crypt from PKP

    Protected ip-telephony from PKP implemented on the basis of Mumble-server, which is a free cross-platform VoIP application open source. The advantage of this software is the fact that the control channel transport traffic between client and server is encrypted using TLS using an algorithm AES-SHA 256-bit, the voice channel transmits voice and surround sound is encrypted OCB-AES 128-bit. Encryption option is mandatory and can not be disabled.

    Connection information in mumble:

    2.1 Using VoIP-crypt from PKP

    In order to start using VoIP-crypt from PKP sufficient register a new account, after successful registration, the user can connect to a Root-channel Mumble-host, for this you need to download and install Mumble-client and add a new connection: Server->Connect->Add new...

    Create a new connection:

    During the first connection, you must enter the password that was used when registering a new PKPID (aka username in the PKP), after the first successful login, the password is automatically saved in the connection settings. It is also worth noting that the Root-channel is shared by all users of PKP. If there is a need in a private conference, the user can create a private channel with access by password, instructions for the creation of which is available in the "Articles" section.

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