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A key and injection gun technology, applied in transmission systems, digital transmission systems, and key distribution, can solve problems such as mutual authentication between devices and modules
Active Publication Date: 2016-09-21
江苏先安科技有限公司
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Problems solved by technology
[0022] In view of the above technical problems, the present invention proposes an offline key injection system and method, which is used to establish an initial trust relationship based on th...
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Embodiment 1
[0119] Example 1, the offline import process is the same as figure 2 As shown, it specifically includes the following steps:
[0120] Step 1, the key injection gun obtains the identification code ID(b) of module B;
[0121] Step 2, the key injection gun obtains the access address of the central key store;
[0122] Step 3, the key injection gun sends ID(b) to the central key store;
[0123] Step 4: The central key store searches for the public key PUBK(b) of module B according to the ID(b), and uses its own private key PRIVK(c) to sign PUBK(b), and obtains the result S(c)=sign (PUBK(b), PRIVK(c));
[0124] Step 5, the central key store returns R=PUBK(b)+S(c) to the key injection gun;
[0125] Step 6, the key injection gun imports R to device A;
[0126] Step 7. Device A verifies the signature S(c) of the central key store, and if the signature matches, imports PUBK(b); otherwise, refuses to import.
Embodiment 2
[0127] Example 2, such as image 3 As shown, the process of obtaining random numbers from device A can also be added in Embodiment 1 to enhance the anti-retransmission capability of the entire system. The second process is as follows image 3 .
Embodiment 3
[0128] Example 3, such as Figure 4 As shown, it is also possible to add the device A public key + private key signature information in Embodiment 2, so as to realize the management of the device key pairing situation (device X and module Y have been paired) by the central key storehouse.
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Abstract
The invention discloses an offline key injection system. The offline key injection system comprises a key injection gun and a central key store; the key injection gun comprises an identification code reader, a display module, a keyboard module, a connection transmission module and a network communication module; and public and private keys of central distributors and public keys of managed equipment or modules are stored in the central key store. The invention further discloses an offline key injection method. Due to the method, reliable import of the public keys of the equipment in a non-reliable environment can be ensured. In the whole process, the key gun is only used as a carrier for interacting data with the central key store; the key gun itself does not participate in generation and modification of data contents; therefore, equipment maintenance/replacement place and personal requirements are greatly simplified.
Description
technical field [0001] The invention belongs to the technical field of security authentication, and in particular relates to an off-line key injection system and method. Background technique [0002] In the industrial field, a certain device A must be started and operated under effective supervision. The detachable module B on the device A acts as this supervision function. Module B uses GPS / Beidou positioning, or short-wave reception, etc. When the device is detected When A's current operating environment meets the operating expectations, device A is allowed to start, otherwise, module B will prevent device A from starting by cutting off the circuit / stop responding, etc. Obviously, one-way or two-way identification and authentication conditions should be met between device A and module B to avoid forgery or tampering of module B commands / responses to bypass the supervision mechanism. [0003] When leaving the factory, the trust relationship between the two can be initializ...
Claims
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Application Information
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