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Couldn't everyone just digitally sign all their comments and messages? Sure it would be a lot more work, but isn't that exactly the sort of thing that SpiderOak had to face with its canary transition? With regards to its "date" on the signed canary, it only established that that signing event occured on or around that date or later, it doesn't provide any assurance that it wasn't actually signed significantly later after the date of the dating. I think here blockchain can help using the Block timestamp as a means of fixing an event into an exact moment in time. Also email being inherently not secure due to metadata leakage via SMTP, bitmessage could come to the rescue, though it wouldn't hurt to wrap a pgp message within a bitmessage since bitmessage is less time tested than gpg/pgp. Attaching VPN over TOR and using that for bitmessage, and wrapping the bitmessage content in a pgp encryption with itself could further be wrapped in an one time pad encryption and doing everything in an air/energy gapped secured/hardened and FDE'd computer would be max security... but again we are facing the UX vs security delima.

Uber Hit With Cap as New York City Takes Lead in Crackdown - August 9th 2018


https://pgp.mit.edu/pks/lookup?op=get&search=0x3745E4F341CEC156
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