Shared Tresors are decrypted client-side to the people you have expressly allowed access. The communication channels use SSL/TLS but the security of this solution does not depend upon it as your data package itself is encrypted. Tresorit never has your password so only you or those you explicitly share with can unencrypt your data via the Tresorit client. The technique employed here is very similar to what LastPass does where all data is encrypted client side using a strong secret password and only the encrypted data is sent up to the cloud using secure channels. Tresors are individual folders that have been client-side encrypted and synced up to the cloud. Tresorit (“Treasure It”) is the holistic cloud storage solution centered around protecting personal data in transit and at rest in the cloud. A quick overview of the related nomenclature before we go deeper: Security is the first and foremost consideration of Tresorit, not an afterthought (see the whitepaper link at the bottom). Tresorit is another contender in the cloud storage category with a heavy emphasis on security. Tresorit looks hopeful on solving both of these problems while providing the majority of the interesting features native to Dropbox. Although Dropbox claims to encrypt your files in the S3 cloud, this has proven to be exploitable and remains a problem for them today. Secondly, beyond SSL + 2-factor authentication to access your Dropbox, you are on your own for securing your contents which ultimately reside in the Amazon S3 cloud. That said, Tresorit looks to be matching the 16GB possible extra referral space which will net them 3GB more total in the end. It has become relatively easy to get 50GB on competing platforms, so Dropbox providing a meager 2GB with opportunities to increase it to ~20GB with referrals on the high side, is paltry. The 2 big pain points I see are free storage space and security. So what’s wrong with Dropbox? Honestly, not much, it is the feature/ functionality yard stick that all other cloud storage providers measure themselves against. Tresorit started with a very strong launch but is now imposing limits that make the offer much less compelling. Even still, Box = unsecure cloud storage since they encrypt contents with private keys they own. (With the Box.net Sync v4 client, this is purportedly fixed, finally, although I haven’t tested. I previously wrote about a potential shift from Dropbox to Box, but due to a fatal flaw in the Box offering I moved away from that ledge. No service or offering is perfect so there are always concessions to be made but as long as you aren’t stepping backwards, technological change can be a good thing. Needs and circumstances change along with the climate we live in, these things drive evolutionary product innovations and robust competition. Part of living on the bleeding edge of technology is always looking for that better mouse trap. Check out my other cloud storage posts as well:
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