即将离开知乎
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https://scholar.google.com/scholar_lookup?title=How+to+time-stamp+a+digital+document&author=Haber,+S.&author=Stornetta,+W.S.&publication_year=1991&journal=J.+Cryptol.&volume=3&doi=10.1007/BF00196791
您即将离开知乎,请注意您的帐号和财产安全。
https://scholar.google.com/scholar_lookup?title=How+to+time-stamp+a+digital+document&author=Haber,+S.&author=Stornetta,+W.S.&publication_year=1991&journal=J.+Cryptol.&volume=3&doi=10.1007/BF00196791