March 11th, 2011 by peter.bassill
Andrew W Morse, Founder, Digital Tsunami “Communications Evolution” recently asked the question; “With the increased complexity of polymorphic malware and the increased use of social platforms, do you have concerns for increased network intrusion via ever-increasing corporate cloud computing?” on Linkedin.
It gave a fair amount to think about so I thought I would share my opinions with you all.
What a great question and thank you for asking it. Ok, do you have more or less security by renting a 1U server from a server farm in a datacenter? Do you have more or less security when rather than rent that server from a server farm you physically house it in your datacenter? There are a number of players out there in the market that would have you beleive that a server in the “cloud” is vulnerable to attack but the truth is that any server with a connection to a public facing network is going to be attacked at some point in time.
From my point of view, the biggest security concern is one I am not hearing about much and that is the disk. Say you rent a cloud server with 100gig and you then use this for some data processing and once you have finished, you close down your server and remove it from the system. That disk is still there.
It is possible to rent a single cloud server and get it up and running in only a few minutes. Once done, add a few cloud disks to it and run standard forensics recovery tools over the disks you have provisioned from the pool. What are the odds of successfully recovering someone’s information? A number of cloud vendors put some form of protect infront of the physical layer, but when we are talking disk, how much work does it take to recover a previous tenants data?
Still worried about network intrusion? Have your admins build and secure your cloud servers properly and maintain a good patching program alongside good security practises for access control.
Worried about a disk recovery attack? Encyrpt your data in the cloud and then carry out a DoD standard 7 pass wipe of your data areas prior to deprovisioning your server.
Worries about security still? Think about risk and not particular technology points.