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What exactly is DRM?

Posted on December 13, 2022

The term “digital rights management” (DRM) refers to a digital licencing system that enables content copyright owners to monitor how and by whom their content is used and to place restrictions on how the information can be reproduced or spread by end users. DRM is also known as “digital rights protection.” The digital rights management (DRM) system safeguards the copyrights of electronic media and guarantees that publishers will earn lawful money from their work. Over-the-top (OTT) platforms like Netflix, Hulu, and Amazon Prime employ it, as do other industry leaders in the field of Video DRM, such as Microsoft’s PlayReady, Google’s Widevine, and Apple’s FairPlay. Other OTT platforms include The digital rights management (DRM) system helps manage and protect digital content across a variety of smart devices, including desktop computers, smartphones, smart TVs, gaming consoles, ebook readers, casting sticks, and more. For instance, Netflix employs several different digital rights management (DRM) systems, including Microsoft’s PlayReady DRM, as well as Video watermarking, in order to prevent any unlawful content leaks and restrict the amount of users who may access a particular premium digital content.

Packaging of DRM Content with DRM

The digital rights management (DRM) packaging of media content encrypts and protects the original content from being used illegally. The method of encrypting the source content into formats such as Dynamic Adaptive Streaming over HTTP (DASH) or HTTP Live Streaming is referred to as DRM content packaging (HLS). The DASH format is also referred to as MPEG-DASH due to the Moving Picture Expert Group (MPEG) being the organisation that developed it. The Advanced Encryption Standard, sometimes known as AES, has emerged as the industry standard technique for encrypting digital content compatible with these formats. The content that has been encrypted is sent to the device that the end user is using. To be able to play back the content, the customer has to have a Digital Rights Management (DRM) licence, which includes the encryption key and is issued by a DRM licence server; this process is managed by a multi-DRM service Tweakvip

The AES-128 encryption standard utilises a block size of 128 bits for each and every one of its blocks. It is so widely regarded as a robust encryption standard that the United States intelligence agency known as the National Security Agency (NSA) recommends using it for the purpose of encrypting top-level communication. Encryption of video files is performed with AES-128, whether the technology in question is HLS, Adobe’s Real Time Messaging Protocol, or digital rights management (DRM)-protected material. Leaders in the industry are of the opinion that hackers are unable to break into files encrypted using AES-128 standards even if they have access to the decryption key. Due to the fact that AES is a symmetric key algorithm, the key that is used for encrypting and decrypting content is the same.

The HLS approach encrypts each video file using blocks as the unit of encryption. The ciphertext from the preceding block is used to encrypt the data for each subsequent block. This method of chain cypher protects the video file and ensures that each block is decrypted individually on the client device where the clip is being viewed.

The AES algorithm is a reliable method for encrypting video files; however, it does have a potential security flaw in the form of an insecure decryption key. This key may or may not be stored in a secure location on the client device, and the end user may also decide to disclose it to other individuals who are not authorised to access it. OTT players are aware of this gap in the market, and as a result, they safeguard their material by using a multi-DRM service. This service guarantees the safe transfer of the licencing key to the customer. Therefore, a powerful multi-DRM software as a service that can manage DRM licences that have been issued by worldwide leaders like Widevine is an absolute necessity for the OTT business.

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