Since October 2012, in addition to games, other software is distributed via Steam.  To use purchased or free games or software from the platform, the Steam client is required, which can be downloaded as freeware under proprietary license on the official page. However, the Steam Community and Steam Store can also be used through a traditional browser. Steam`s low broadcast cost and fast reaction times allow for more intensive use of specific pricing models compared to traditional retail distribution. For example, in November 2011, unknown persons broke into Valve`s servers and may have been able to retrieve customer data (billing addresses and credit card information). Valve then advised all customers to carefully review their credit card bills.  In October 2012, ReVuln discovered a critical security flaw related to an extension of the Windows “steam://” protocol. ReVuln managed to take full control of the affected computers, thanks in particular to fake URLs and a logging function of the source and unreal graphic designers. In principle, the problem persists today.
 In October 2013, security expert Graham Sutherland uncovered a critical security vulnerability related to the Windows NT “SeDebugPrivilege” privilege and insufficiently secure storage areas. Graham Sutherland warned of the possibility of full takeover of rights by malware. Valve responded a little later with a security update.  Users can now back up their account with Steam Guard two-factor authentication, which sends a PIN via email when logging in from an unknown device.