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To change (or update) the generated CRT key, perform step 1 to 2. The CRT key, self-signed certificate and certificate issued by CA are valid in a set. When the CRT key is changed, it is necessary to re-generate the self-signed certificate or re-apply for the certificate issued by CA.
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When the CRT key is updated, the log of the previous CRT key is saved. When the [History] button of “Current CRT key” on the “CRT key generate” dialog box is clicked, the “Previous CRT key” dialog box will be displayed, and it is possible to check the key size and generation time & date of the previous key. When the [Apply] button is clicked on the “Previous CRT key” dialog box, it is possible to replace the current CRT key with the previous one.