A design about authentic CPK electronic seal system encrypted by USB Flash Memory Disk was given first time in this article.
文章首次在国内公开论述了以USB闪存固件为加密载体的不可破解的CPK电子公章系统的设计思想；
A design about authentic CPK electronic seal system encrypted by USB Flash Memory Disk was given first time in this article.
文章首次在国内公开论述了以USB闪存固件为加密载体的不可破解的CPK电子公章系统的设计思想；
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