Zscaler ThreatlabZ, the research arm of SaaS security provider Zscaler, recently released data based on more than 200 billion first quarter transactions in its cloud, which serves global companies of all sizes. A transaction, as defined by Zscaler ThreatlabZ senior security researcher Mike Geide, occurs every time a file is accessed from a web server.
The data shows transactions originating from iOS devices increased steadily over the quarter, ending March with slightly more than 50% of mobile activity. Transactions from Android devices, meanwhile, dropped to 37% by the end of March. As recently as December 2011, Android and iOS devices were about equal at 47% of transactions among Zscaler's enterprise customers, Geide says, after Android had held the lead for most of 2011.
BlackBerry devices observed in Zscaler's study dropped from about 18% of January transactions to about 15% by the end of March.