Bit Chat

Get a secure, peer-to-peer instant messenger

One messenger for Internet and LAN chat with end-to-end encryption

Version 4.5.1 (alpha)

Windows 10/8.1/8/7/Vista
(.NET Framework v4.0 required)
Ubuntu Linux
(Mono Framework required)
Quick Start
Read this blog post to know how to register for a profile certificate and get started with Bit Chat.
What's New?
Read this blog post to know what's new in this release.
Open Source
Source code available under GNU GPLv3 Licence on  GitHub
File Details
FormatZIP File
Size841 KB
SHA138D196E4 88E4B7E4 7594C5D1 07850591 3DB7AA34
SHA256D5C74E5A E476FC8A 1953C021 74CEC83D C311450E 359F8253 C54380F5 2FB4B97B
FormatZIP File
Size455 KB
SHA2564F789A12 1C9F9573 8DF1DAF3 831A4B2C 59D52CFE F1EE766A 7768FEB1 BC53FE09
FormatGZiped TAR Archive
Size442 KB
SHA1481511D4 21946516 C609E4CC 6D4A5C35 5FA30EC9
SHA256FB79D53A 3708DDB5 1BB990E2 8284DDAD 5C473965 6E80349E F0D5ECA8 A141F53A
Technitium Bit Chat Screen Shot

Technitium Bit Chat is a secure, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using strong cryptography. It can be used over Internet and private LAN networks for instant messaging and file transfer.

The architecture is designed keeping in mind the security principle that everybody is secure or no one is. There is no meta data generated when you use Bit Chat. The only thing that we know, is the email address of the user who registered for a digital certificate. The digital certificate tells that the email address was verified, which is similar to, in concept, to any domain validated SSL certificates issued to websites.

To know more, read this blog post.

Click here to read Frequently Asked Questions (FAQ).

Click here to read Bit Chat whitepaper.


  • Works similar to a bit-torrent client so, no servers involved!
  • No meta data is stored since even we don't know to whom you are chatting with.
  • Works as LAN chat just as it works on the Internet.
  • Can work in private LAN networks not connected to Internet.


  • Profile certificate signed with RSA-4096 and SHA-256 hash ensures identity of opposite peer.
  • Provides end-to-end encryption with Perfect Forward Secrecy (PFS) using DHE-2048 or ECDHE-256.
  • Protocol is secured with AES 256-bit encryption.
  • Open source code allows you to inspect the implementation.

Why Is Privacy Important?

Watch this episode of Last Week Tonight with John Oliver: Government Surveillance (HBO) in which John sits down with Edward Snowden to discuss the NSA, the balance between privacy and security, and dick-pics. You may wish to skip to 13:38 in the video to jump to the interview.

"Your rights matter because you never know when you're going to need them."
- Edward Snowden

Alpha Version

Technitium Bit Chat current release is in alpha version. This means the software is not fully complete and will undergo major changes in its protocol or user interface design. There may be noticable bugs which will be addressed with an automatic update. You are welcome to report any issues by sending an email to

Read More

Read more on the original concept in this blog post.