🇺🇸 🇬🇧 [EN] DMR - DMRA RC4/AES encryption, Why is the audio quality decreasing ?

Описание: The DMR Association (DMRA) now uses standardized ciphering (encryption) methods, however the implementation of these algorithms (which did not initially seem to be provided for in the DMR standard) cause loss of audio quality.

This loss of audio quality is due to the fact that certain bits carrying voice are used/replaced by data relating to the encryption used, in this case it is initialization vectors which are mixed with the bits carrying voice.

I explain how it works in this video and why it causes a slight loss of audio quality.

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▶️▶️▶️Découvrez ma formation en ligne sur le chiffrement Motorola RC4 40 bit :◀️◀️◀️
https://www.1geniesup.fr/etude-de-la-...

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▶️▶️▶️To learn how to decode MotoTRBO ARC4 encryption, please go here :◀️◀️◀️
https://www.1geniesup.fr/en/study-of-...

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Contenu de cette vidéo :
00:00 Introduction
01:22 The 2 types of encryption offered by manufacturers
02:55 Did you heard the audio quality loss ?
03:31 Why a loss of audio quality? Because of initialization vectors (IV) usage !
04:45 Comparison of basic and enhanced privacy algorithms
10:03 What the Motorola MotoTRBO patent says
13:02 How are initialization vectors (IV) inserted into DMR voice frames ?
15:29 The audio quality offered by others ciphers
16:30 Conclusion
17:26 The final word

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Link to the Motorola encryption patent (Method and device for sending encryption parameters - US20100098254A1)
https://patents.google.com/patent/US2...

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Mots clefs :
PMR, DMR, dPMR, NXDN, ICOM, Motorola, Kenwood, Airbus, TETRAPOL, TETRA, ANTARES, ACROPOL, EADS, 3G, 4G, 5G, LTE, Mission Critical, Talkie Walkie, PTT, Push To Talk, Radiocommunications, Radio FM, CiBi, CB, Radio AM, ETSI TS 102 361, DMRA, DMR Association, Basic Privacy, Enhanced Privacy, Enhanced Privacy RC4, Enhanced Privacy AES