Tor project utility release , which allows you to securely and anonymously send and receive files, as well as organize the work of a public service for exchanging files. The project code is written in Python and under GPLv3 licenses. Ready packages for Ubuntu, Fedora, Windows and macOS.
OnionShare runs a web server running as a Tor hidden service on the local system and makes it available to other users. To access the server, an unpredictable onion address is generated, which acts as an entry point for organizing file exchange (for example, "http://ash4...pajf2b.onion/slug", where slug are two random words to enhance security). To download or send files to other users, just open this address in the Tor Browser. Unlike sending files by email or through services such as Google Drive, DropBox and WeTransfer, the OnionShare system is self-sufficient, does not require access to external servers and allows you to transfer a file without intermediaries directly from your computer.
Other participants in the file sharing do not need to install OnionShare, just the usual Tor Browser and one instance of OnionShare for one of the users is enough. Forwarding confidentiality is achieved by secure transmission of the address, for example, using the end2end encryption mode in the messenger. After the transfer is completed, the address is deleted immediately, i.e. you will not be able to transfer the file a second time in normal mode (you need to use a separate public mode). A graphical interface is provided on the side of the server running on the user's system to manage sent and received files, as well as to control data transfer.
In the new release, in addition to the tabs for opening sharing and receiving files, the function of publishing a site has appeared. This feature allows you to use OnionShare as a simple web server to serve static pages. The user just needs to drag the necessary files to the OnionShare window and click the "Start sharing" button. After that, any Tor Browser users will be able to access the hosted information as a normal site using the URL with the onion address.
If the index.html file is located at the root, then its contents will be shown, and if it is not there, then a list of files and directories will be displayed. If you need to restrict access to information, OnionShare supports logging in to the page with a login and password using the standard HTTP Basic authentication method. The OnionShare interface has also added the ability to view information about the history of visits, allowing you to judge which and when pages were requested.
By default, a temporary onion address is generated for the site, which is valid while OnionShare is running. To save the address between restarts, there is an option in the settings to generate permanent onion addresses. The location and IP address of the user system running OnionShare is hidden using Tor hidden services technology, allowing you to quickly create sites that cannot be censored and the owner cannot be traced.
Of the changes in the new release, we can also note the appearance in the file sharing mode of the ability to navigate through directories - the user can open access not to individual files, but to the directory hierarchy and other users will be able to view the contents and download files if the option to block access after is not selected in the settings first boot.
Source: opennet.ru