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Method for distributing public key of dns server based on dhcp

A DNS server and server technology, applied in the Internet field, can solve the problems of exposing users' personal privacy, and achieve the effect of saving complicated processes and avoiding the request process

Active Publication Date: 2018-08-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the domain name information carried in the DNS message will expose the user's personal privacy

Method used

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  • Method for distributing public key of dns server based on dhcp

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0037] exist figure 1 In the shown DHCP / DHCPv6 scenario, the encryption process includes the following steps:

[0038] 1. The administrator configures a unique pair of public and private keys for the local DNS server, namely Pu and Pr. The administrator configures the public key Pu of the DNS server on the DHCP server. The private key Pr of the DNS server is kept by the DNS server itself. The DHCP server stores the IP address of the DNS server and the public key Pu in the binding table maintained by itself.

[0039] 2. The DHCP server sends the IP address of the DNS server and the public key Pu corresponding to the DNS server to the user through a DHCP message.

[0040] 3. After receiving the DNS server IP address and DNS server public key assigned by the DHCP server, the user generates a unique symmetric key Ks, and establishes a DNS server I...

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Abstract

The present invention is a DNS server public key distribution method based on DHCP service, including the sending method of the public key and the storage method of the public key. The present invention can be used to solve the problem of key distribution in the DNS message encryption process. The key distribution technology can put the public key of the DNS server into the options of the DHCP message and distribute it through the DHCP service. The public key can be sent to the user when DHCP configures the IP address for the user, or it can be sent to the user when the user requests the DNS server to configure parameters. is sent to the user; this method is applicable to DHCP and DHCPv6 scenarios.

Description

technical field [0001] The invention belongs to the technical field of the Internet, in particular to a DHCP-based DNS server public key distribution method. Background technique [0002] DNS (Domain Name System, Domain Name System), which provides mapping from domain names to addresses, is one of the key services for users to access the Internet. Address query is performed between the user and the DNS server by sending DNS request and reply messages. However, the domain name information carried in the DNS message will expose the user's personal privacy. Therefore, in order to prevent an attacker from eavesdropping on the DNS message, it is necessary to encrypt the content of the DNS message. [0003] When a user sends a DNS request, the request message will be sent to the local DNS server first. The local DNS server first inquires the root domain name server, and then inquires down one level until the query result is returned to the user. When the local DNS server sends...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/12
CPCH04L63/062H04L61/5014H04L61/4511
Inventor 崔勇李天翔刘聪
Owner TSINGHUA UNIV