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SRTP code stream master key update method, system and device and storage medium

An update method and master key technology, applied in transmission systems, digital transmission systems, and key distribution, can solve the problems of increasing network load, increasing key negotiation time, and more information, and achieving the effect of reducing network load

Active Publication Date: 2019-01-25
SUZHOU KEDA TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method also has some defects: during key negotiation, the information for asymmetric encryption and decryption increases (multiple master keys), which increases the time of key negotiation, and the number of master keys does not have a reasonable value; The MKI field (4 bytes) needs to be added to the SRTP packet to increase the network load

Method used

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  • SRTP code stream master key update method, system and device and storage medium
  • SRTP code stream master key update method, system and device and storage medium
  • SRTP code stream master key update method, system and device and storage medium

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Embodiment Construction

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.

[0047] like figure 1 As shown, the embodiment of the present invention provides a kind of SRTP stream master key updating method, comprises the following steps:

[0048] S100: The first communication party negotiates with the second communication party to obtain a first master key and a second master key, and the first master key and the second master key respectively correspond to the first preset value of the master key ide...

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Abstract

An SRTP code stream master key update method, system and device and a storage medium are provided. The method comprises the steps of: The first communication party and the second communication party negotiate to obtain the first master key and the second master key, wherein, when the master key identifier is the first preset value, the first master key plus cryptographic stream is adopted betweenthe two communication parties, and when the master key identifier is the second preset value, the second master key plus cryptographic stream is adopted between the two communication parties; The first communication party generates a new master key, updates the stored first master key with the new master key, and sets the master key identifier as a second preset value. The first communication party sends a new master key to the second communication party; When the first communication party receives the update key success notification of the second communication party, the master key identifieris set to the first preset value. The invention only needs to negotiate two master keys, realizes the function of updating the master key by switching the master key, and the master key updating stage does not affect the normal data transmission.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a method, system, device and storage medium for updating a SRTP stream master key. Background technique [0002] RTP (Real-time Transport Protocol, Real-time Transport Protocol) provides a standard packet format for transmitting audio and video on the Internet, and provides end-to-end transmission services with real-time characteristics for data. SRTP (SecureReal-time Transport Protocol, Secure Real-time Transport Protocol) is a more secure transport protocol defined on the basis of RTP, designed to provide encryption, message authentication, Integrity assurance and replay protection. The master key (Master Key, MK) is a random number agreed upon by the communication parties during SRTP key negotiation. It needs to be kept secret and is an important parameter used to generate the session key. [0003] SRTP can be used to transmit video conference data. In the prior ar...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L29/06
CPCH04L9/0838H04L9/0891H04L9/0894H04L63/06H04L65/65
Inventor 常宇宙王彦杰雷心田
Owner SUZHOU KEDA TECH
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