Cloud is more secure than your own hard disk
February 4, 2009 2 Comments
I had several feedbacks from my last post on the Outlook Attachment Remover from my colleagues. The number one response is: “Do not put our client’s data there, even if encrypted, it is against the policy”. In this post, I will discuss why Cloud is secure and what a sensible company policy should be.
When CIO gives us the company laptop, we promise to take full responsibility for it. We are expected to set a strong password so that no one can logon to our machine, and we are expected to lock our screen whenever we are away. When clients send us their confidential data, they expect us to secure it in areas where only we have access to. We do not need client permission to store the data on our hard drive because we have promised to our CIO and our clients that we will guard our laptop and hard drive.
When we request a bucket from Amazon S3, the bucket, by default, is readable/writable by us only. Similar to a password, our access to the bucket is guarded by our Amazon credential, which includes both a 20 alpha-numerical characters of Access Key ID and a 40 alpha-numerical characters of Secret Access Key. We promise to keep the Keys to ourselves and Amazon promises the access right works as designed. So, just like our hard disk, the bucket is ours and ours alone. Why should not we be able to store our and client data there? Why do we need client permission?
As much as we promise, accidents do happen. Our laptop could be infected with virus and Trojan horses, we could lose our laptops, Amazon security could be breached. In the past year alone, I know at least two incidents where our company laptops were stolen. In contrast, I have not heard ANY S3 security breach since they launched their service three years ago. It is a more dramatic contrast than you think because S3 has millions of customers and it hosts 29 billion objects, whereas, our company has much fewer employees and far fewer number of laptops. So, is our hard disk more secure than S3?
Since no one can say their system is 100% secure, we have to put in measures to guard against the rare events. Our company laptop has encryption software installed. When the laptop is lost, we are safe because no one can read the data.
Now, if I encrypt my email attachments, including client data, and put them in my own S3 bucket that is readable/writable by me only, and hold on to the password to myself, why would I need client permission? Why is it not secure? Why is it against the company’s policy? If anything, based on the past track record, CIO should ban us from storing data on our hard drive instead.