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Wouldn't it be an option to basically chain the "events" in the local storage queue with crytographic hashes (kind a like a block chain). You can then fairly ea

Wouldn't it be an option to basically chain the "events" in the local storage queue with crytographic hashes (kind a like a block chain). You can then fairly easily verify modifications somewhere in the list of events. It wouldn't make it entirely impossible, but much more complicated.

cjg 11y ago
No, because if you have the ability to create the hash on the machine then you have the ability to create a hash for a manipulated version. The blockchain gets round this with consensus.
- Asbostos 11y ago
  A hacker does yes, but can a kid recreate the hash quickly without the teacher noticing? If some script appear on the net to automate that, Khan academy could react by changing their hash frequently.
  - douche 11y ago
    I think you give the teachers far too much credit.