Use case - John and Jane

Tricky, difficult or completely unlikely but maybe possible : Use Case, 
John and Jane, Jane does not leave John but wants to spy him, sometimes 
she uses his computer then knows how to access it, while John is 
visiting the social site he leaves 5mn to see the postman, she inserts 
from his web console an iframe in the page (jane.com) and sends a 
postMessage with John's keys to the iframe which "stores" (ie references 
the underlying data) the keys in jane.com's indexedDB. She intercepts 
John's connexion and decrypt messages with John's computer when he is 
out reinjecting messages using jane.com.

Usually this will not work because outside origin iframes can not access 
indexedDB, but indexedDB spec just says : User agents MAY restrict access...

Regards,

-- 
jCore
Email :  avitte@jcore.fr
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Received on Friday, 22 March 2013 18:09:54 UTC