Cloud security is still one of the key hindrances in adopting cloud computing services, especially as pertaining to the public cloud. With the public cloud market expected to triple from $12.1 billion last year to $25.6 billion by 2015, security is becoming increasingly important, research firm Analysys Mason said in a new report.

In a recent piece of research, Analysys Mason examined the various security standards to which cloud service providers should adhere and highlighted what percentage actually do. The research looked at several key cloud service providers, including Amazon, Box.net, Citrix Systems, Egnyte, Google, LogMeIn, Microsoft, Salesforce.com, Symantec and more, to determine whether they follow or adhere to certain security standards. Here's a look at some of the findings.