2023-08-02 20:35:27
DRM (digital rights management) is a set of technologies that control the use, modification, and distribution of copyrighted digital content. Basically they are ways to control the way people can consume certain paid content such as, for example, games, sold as digital media, movies and music, available on streaming services, among others.
How does DRM work?
What and how DRM (digital rights management) works. Source: Oficina da Net
The purpose of using digital rights management (DRM) systems is to restrict content access to certain hardware to prevent consumers from cloning content they have (or have not) purchased. To do this, technologies developed to control access are used, such as TPMs (technological protection measures), which restrict the transmission of certain content to specific hardware.
A DRM system uses specific encoding, encryption, authentication and way of reproduction. Authentication and encryption are extremely important for the correct functioning of the system for protecting copyrighted content. Below is a schematic explaining how DRM technologies work.
Scheme of operation of a DRM system (digital rights management or management of digital rights). Source: Vitor Valeri
What can DRM restrict?
You can control many aspects of access to certain paid content. Are they:
Identification of documents and works of art through watermark. Expiration date to determine how long certain digital content or document will be available to certain users. Define which IP addresses, regions or devices can and cannot access content. Do not authorize screen capture or recording of excerpts. Prevent the user from printing content. Determine who can share/forward, edit, or save content. Access data relating to the time that certain media was accessed or a certain program was accessed or downloaded.
Key DRM Technologies for Video Streaming
There are many DRM systems being used in the market to protect video content on streaming services such as Netflix. However, basically we have 3 big and popular ones. Are they:
PlayRead: Developed by Microsoft, it is a DRM system that can be used to distribute audio/video content over the internet.
FairPlay: Designed to stream streaming media over the HTTP LiveStreaming protocol. Popularly called FPS (FarPlay Streaming), providers can use this system to encrypt their contents, change keys and protect playback on iOS, tvOS, Safari (for iOS) and macOS.
Widevine: Created to license, distribute and protect the playback of content securely on any device used by the consumer.
What is the difference between hardware and software protected DRM?
Hardware-protected DRM is done through components implemented on the boards of electronic devices. This approach can be used to further enhance the security provided by software-implemented DRM. This is the case with the MQA audio format, where there is playback protection in both hardware and software.
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