Hey all,<br>
Am mulling over a federated datastore for zero-knowledge web applications, using hashcash as a &quot;commitment&quot; price for otherwise gratis data storage. All very straightforward, but:<br>
Zero knowledge is as much for host protection as client protection. Hosts don&#39;t WANT plaintext.<br>
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Short of stupidly CPU-intensive stuff like letter counting, UTF8 decoding, etc, how might a server verify it&#39;s receiving encrypted data? I was thinking a function that estimates apparent entropy and rejects anything that doesn&#39;t look random enough to be encrypted, what such functions are available, fast, widely implemented?<br>
-- <br>
Sent from my Android device with K-9 Mail. Please excuse my brevity.