A multitude of security problems followed on the heels of Microsoft Visual Basic developers' use of ActiveX controls in Web applications. There was repeated opportunity for imposters or uninvited intruders to substitute their own executables in the download and run them on unsuspecting users' PCs.
But Fima Katz, CEO of Ajax integrated development environment supplier Exadel, says the issue is careful design, not the interactive technology. "You're running somebody's code in your browser. There's no question you're more exposed," he says, but if you do it right, you don't have any more problems than with non-Ajax systems.
Ajax 101: From Toolkits To Strategy, How Companies Can Put It To Use