System and method of fast message decryption
A message, fast technology, applied in the field of encryption and decryption technology and network security, can solve the problem that affects the processing speed of network equipment on messages
Inactive Publication Date: 2013-07-10
OPZOON TECH
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Problems solved by technology
[0002] Existing IPSec mainly uses the authentication header (ah) protocol and the encapsulating security payload (esp) protocol to ensure the integrity and security of data packets during transmission on the network. If a packet is loaded with ah header and esp header at the same time, ah The header is on the outer layer, and the esp header is on the inner layer. When the encryption and decryption chip decrypts the message, the CPU first finds the decryption key of the ah header according to the triple, and puts the decryption key into the encryption and decryption together with the message. Decryption is carried out in the chip, wherein, after decrypting the ah header, the triplet of the esp header will be searched through the CPU again to find the decryption key of the esp header, and then the decryption key and the message of the esp header will be given to the encryption and decryption chip again Perform esp header decryption processing, so that not only the CPU needs to search twice for the triplet to find the decryption key, but also needs to interact with the encryption and decryption chip twice, which seriously affects the processing speed of the network equipment for the message
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[0026] A system and method for quickly decrypting messages proposed by the present invention will be described in detail below with reference to the drawings and embodiments.
[0027] Such as figure 1 As shown, the present invention provides a kind of method of fast deciphering message, comprises the following steps:
[0028] S1, after the cpu receives the message, it judges whether it is the first time to receive the message, if so, then execute step S2, if not, then execute step S3;
[0029] S2, the cpu obtains the key of the ah header and the esp header of the message at the same time, and associates the keys of the ah header and the esp header to generate a two-dimensional table;
[0030] S3. The cpu queries its two-dimensional table, so that the key of the esp header associated with it is obtained while obtaining the message ah header key;
[0031] S4. The encryption and decryption chip receives the key associated with the ah header and the esp header, and decrypts the ...
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The invention provides a method of fast message decryption. The method comprises the following steps: after a central processing unit (cpu) receives messages, whether the massages are first received or not is judged, and if the massages are first received, a secret key of an ah head and a secret key of an esp head are simultaneously acquired by the cpu, and the ah head and the esp head are associated to generate a two-dimensional table; and if the massages are not first received, the two-dimensional table are searched by the cpu so as to ensure that the secret key of the ah head is acquired, and meanwhile the secret key of the esp head associated with the secret key of the ah head, the associated secret key of the ah head and the secret key of the esp head are received by an encryption and decryption chip, and the massages are decrypted by the encryption and decryption chip. Due to the fact that the secret key of the ah head is associated with the secret key of the esp head, triad searching does not need searching twice by the cpu, and the cpu and the encryption and decryption chip do not need to interact twice, and the messages with the ah head loaded and the messages with the esp head loaded can be simultaneously decrypted, and the speed of message processing of the cpu is improved.
Description
technical field [0001] The invention relates to the field of encryption and decryption technology and network security, in particular to a system and method for quickly decrypting a message, and the message is loaded with an ah header and an esp header at the same time. Background technique [0002] Existing IPSec mainly uses the authentication header (ah) protocol and the encapsulating security payload (esp) protocol to ensure the integrity and security of data packets during transmission on the network. If a packet is loaded with ah header and esp header at the same time, ah The header is on the outer layer, and the esp header is on the inner layer. When the encryption and decryption chip decrypts the message, the CPU first finds the decryption key of the ah header according to the triple, and puts the decryption key into the encryption and decryption together with the message. Decryption is carried out in the chip, wherein, after decrypting the ah header, the triplet of t...
Claims
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Inventor陈海滨
OwnerOPZOON TECH