No, availability is not security!

Security is a very important factor in my choice of distributions and software solutions, and I tend to hold a very strict view of what it means from a modern computing standpoint. In one sentence, my stance on security is this: A sound and complete security posture has to take both physical and network security into account.

Anything less will not fly. So when I came across an article that attempts to sell that view short for the sole purpose of promoting a product, it didn’t sit well with me. The offending article was written by Frank Karlitschek, founder and CTO of Owncloud, a cloud storage service and solution.

In More to Security than Encryption, he takes this skewed stance that it is (somewhat) ok to say something is secure even though it lacks encryption. He then makes several points to support that stance.

Here’s what he wrote about availability and security:

Availability as security — If you own your data it can’t be lost because someone is shutting the cloud service down, or if AWS/Dropbox goes down.

Sure, but what good is not losing your data if an unauthorized party can access it just as easily and readily as you can. There’s no debating the benefits that cloud storage services bring to the table, but there’s an ongoing discussion about the security implications of dumping all your digital assets somewhere out there. I will not take a cloud service or solution that touts “availability as security” seriously. Your data is either secure or it’s not. Just being able to access it wherever and whenever does not count as security. Lost data can still be secure, if nobody else can access it. That’s one of the benefits of encryption.

The other points he made in that article are valid, though a few are debatable, but “availability as security” is dangerous and misleading.

Related Posts

LibreOffice 3.3 released The first stable release of the free office suite is available for download The Document Foundation launches LibreOffice 3.3, the first stable rele...
World’s smallest 4 megapixel USB3 vision camera and Tux, the Linux mascot Ximea just announced the world's smallest 4 megapixel USB3 vision industrial high-speed camera. Measuring just 26.4 x 26.4 x 21.6-mm, it is the latest...
Guide to Chromebook and Google account privacy settings for students I love the idea behind Chromebooks, but because of the privacy implications of using them, I just admire them from a distance. However, because of ...
Guide to writing NGINX rewrite rules Looking for a definitive guide to crafting Nginx rewrite rules? Today is your lucky day! The folks at Nginx have published just what you're loo...
What Factors Contribute to the Success or Failure of Software Firms? Throughout the 1990s and 2000s, news about 20-somethings becoming billionaires from the sale of their software companies flooded the media, giving the...
French Military contributes code to Mozilla Thunderbird The latest release of the open source email client Mozilla Thunderbird contains code from the French Military. The involvement of the Ministry of Def...

We Recommend These Vendors and Free Offers

ContainerizeThis 2016 is a free, 2-day conference for all things containers and big data. Featured, will be presentations and free, hands-on workshops. Learn more at

Launch an SSD VPS in Europe, USA, Asia & Australia on Vultr's KVM-based Cloud platform starting at $5:00/month (15 GB SSD, 768 MB of RAM).

Deploy an SSD Cloud server in 55 seconds on DigitalOcean. Built for developers and starting at $5:00/month (20 GB SSD, 512 MB of RAM).

Want to become an expert ethical hacker and penetration tester? Request your free video training course of Online Penetration Testing and Ethical Hacking

Whether you're new to Linux or are a Linux guru, you can learn a lot more about the Linux kernel by requesting your free ebook of Linux Kernel In A Nutshell.


  1. Ostensibly

    The ‘availabily as security’ is more like a ‘security blanket’ or assurance from a parent that ‘you’re safe’ than “IT Security”. The ‘security’ in the author’s context would be more of the peace-fo-mind variety that the data is owned and housed by you ‘in the cloud’ as opposed to someone else, on thier systems, network, drives etc. Not so much that is is available to you but also that its location and control vectors are known.

  2. Pingback: Links 22/1/2013: Linux Outpaces Market Share of Windows, Mozilla Phone, Fedora Reviews Aplenty | Techrights

  3. This is a case of one sentence being taken out of context. The offending quote is only one part of an overall security policy – not a security policy by itself.

    While poorly written (and probably the reason it was misinterpreted) it makes the point that if you cannot access your data when you need it it doesn’t fulfill the security need or the reason you are putting your files into a cloud in the first place.

    After all, it doesn’t matter how secure anything is if not even the user has access to it.

  4. If you equate denial with theft, i.e., you don’t have it anymore, then the opposite of denial (availablity) is a form of security, and the active form of availability (resiliancy) is the best defense against denial of service or denial of access attacks.

    This translates best to network security, but it can translate to data/object security as well, where it forms the foundation of disaster recovery (defense against widespread vectors of vulnerability to denial of access attacks).

  5. Encryption is useless if it is just some serverside encryption where I do not control the algorithm and the keys. Encryption only benefits me if I am the keyholder, not some admin who will cooperate with the feds or whomever. Don’t forget Aaron!

Leave a Comment

Your email address will not be published. Required fields are marked *