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Establishing secure communication without local time information

A technology for secure communication and absolute time, used in secure communication devices, key distribution

Pending Publication Date: 2022-01-14
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This obviously has the disadvantage of having the necessary support for Kerberos in the field device (but most importantly, in the time server)

Method used

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  • Establishing secure communication without local time information
  • Establishing secure communication without local time information
  • Establishing secure communication without local time information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. Although some embodiments will be described in the context of a specific field of application, the embodiments are not limited to this field of application. In addition, the features of various embodiments may be combined with each other unless specifically stated otherwise.

[0047] The drawings should be considered as schematic representations and elements shown in the drawings are not necessarily shown to scale. Rather, various elements are represented so as to make their functions and general purpose apparent to those skilled in the art.

[0048] figure 1 is a flowchart illustrating a method 300 of operating a server device 30 to establish a secure communication with a client device 10 and a method 100 of operating a client device 10 to establish a secure communication with the server device 30 according to an embodiment and interacting with each other...

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PUM

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Abstract

Methods (100; 300) and devices (10; 30) are provided for establishing secure communication between the devices (10; 30) without relying on local time information. According to the methods (100; 300), a client device (10) which is going to establish the secure communication to a server device (30), is provided by the server device (30) with a proof of its integrity. The proof of integrity of the server device (30) is issued by a trusted third party, TTP, to which both devices (10; 30) have a trust relation.

Description

technical field [0001] Various embodiments of the invention relate to methods and apparatus for establishing secure communications between devices without relying on local (ie, synchronized) time information. Background technique [0002] Field devices related to Internet of Things (IoT) or Industry 4.0 applications are often very resource-constrained and often are not even equipped with a real-time clock (RTC) because of the power, energy and physical size constraints of the field device. The RTC is a clock device that keeps track of the current date and time. It is usually implemented in the form of a battery-backed integrated circuit. This time information is synchronized, if necessary, with components external to the device or with a time source to adjust the time within the system to have a basic notion of time. IoT devices must be regularly updated to prevent large-scale disasters in the event of major weaknesses being discovered. This poses serious problems about h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/40H04L9/08
CPCH04L63/08H04L9/3271H04L63/0823H04L9/321H04L9/0847H04L63/0442H04L9/0825H04L9/088H04L9/3265
Inventor H·阿绍尔F·德桑蒂斯S·弗里斯
Owner SIEMENS AG