About Copy-Control System (User Authentication)

About Copy-Control System(from May 25th, 2011)

DLsite offers an optional copy-control system for your products.

It helps prevent illegal distribution of your work on the web. However, it does not guarantee absolute protection against such acts; it only ensures your products not to be copied easily.

The copy-control system has some limitations to the file format and to the browsing environment.
Please make sure of the following limitations.

How to add copy-control to your products

DLsite will perform the implementation.
The only thing you need to do is to check the box for the copy protection when you submit a product.

The copy-control for your products is offered for free.

How it works

When you view a product, your login ID and password will be requested. You can view the products only when your purchase at DLsite is confirmed through the authentication. The product is viewable only on the PC or the smartphone on which you authenticated the purchase.

Except for the game, you need to install special software/app according to its category to browse the product.


  • The copy-control system becomes of no value if your products are available in other shops with no relevant copy-control system.
  • You cannot add the copy-control option to your products after its release on DLsite.
  • The use of free anti-virus software such as avast!, AVG ANTIVIR and COMODO may prevent you from viewing the product normally.

Specifications of the User Authentication (Abstracts)

Categories of the protected product CG collection in HTML format Protects files such as html, CGs, Flash and WMV.
PDF * Protects PDF files.
Movie, voice, music Compatible with WMV, AVI, Mpeg, WMA, MP3 and WAV.
Comic, novel and CG collection in JPEG format * Viewable in DLsite Viewer.
Game Protects data files, and not the executable files. When a game is composed of a single executable file, or when most of the data is included in the executable file, the copy-control will have little or no effect.
Operational requirements PC
  • Windows 7 (32/64-bit version)
  • Windows 8.1 (32/64-bit version)
  • Windows 10 (32/64-bit version)
  • Mac OS X 10.8 / 10.9 / 10.10/ 10.11 * PDF format only
Internet connection at the time of authentication
  • Android 2.2 or newer
  • iOS 4.x or newer (5.1.x or newer is recommended)
  • The smartphone-compatible products are limited to the categories marked with *.

If a user cannot view a product because of the copy-control system

DLsite will offer support for the problem regarding the copy-control system. If you receive an inquiry from users, please tell them to contact DLsite.