How to time-stamp a digital document
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Stuart Haber; W. Scott Stornetta
📂
Article
📅
1991
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Springer
🌐
English
⚖ 806 KB
The prospect of a world in which all text, audio, picture, and video documents are in digital form on easily modifiable media raises the issue of how to certify when a document was created or last changed. The problem is to time-stamp the data, not the medium. We propose computationally practical pr