WebApp Sec mailing list archives
Secret Sharing
From: saghar estehghari <s.estehghari () gmail com>
Date: Thu, 1 Aug 2013 16:48:31 +0200
Hi, I'm working on a project which involves security of the cloud data. The scenario is as follows: Users A and B have registered to a cloud service (cloud assumed to be semi-trusted). A and B both have secret keys (KA and KB) (for symmetric encryption) and public keys (PKA and PKB) on the cloud server. KA and KB are each encrypted with the passwords of A and B. Now consider A wants to share a file F that is encrypted with key K (K is generate randomly by A). Now K should be shared securely with B over the cloud (we consider that B is not online at the time of sharing). To do this one option would be encrypting K with PKB which should be decrypted by B when he gets online. However this option seems to be complicated for my client. I was wondering whether you have better options in mind that could help me. Please let me know if the explantation is not clear. Thanks This list is sponsored by Cenzic -------------------------------------- Let Us Hack You. Before Hackers Do! It's Finally Here - The Cenzic Website HealthCheck. FREE. Request Yours Now! http://www.cenzic.com/2009HClaunch_Securityfocus --------------------------------------
Current thread:
- Secret Sharing saghar estehghari (Aug 01)
- Re: Secret Sharing Jamie Riden (Aug 01)
- Re: Secret Sharing Nir Izraeli (Aug 04)
- Re: Secret Sharing Siim Põder (Aug 04)
- <Possible follow-ups>
- RE: Secret Sharing JAntonakos (Aug 04)
- Re: Secret Sharing Jamie Riden (Aug 01)