As more and more applications move to the Web, computer security is increasingly threatened by security holes in Web applications, denial of service attacks on business Websites, and phishing expeditions that spread through social networks. If Twitter can be hacked, so can your company’s Website. A startup called Dasient is preparing to address the new class of security issues arising from Web applications with a suite of tools to track and close off such vulnerabilities. It will officially launch next week.

The company will target both Website owners and ISPs as potential customers. Attacks on Websites and Web applications can spread faster than traditional desktop viruses, but they can also be detected faster. A Web-scale approach will be the key to keeping one step ahead of the bad guys.

Dasient’s founders are Neil Daswani, formerly a Web security engineer and product manager at Google, Ameet Ranadive (ex-McKinsey), Googler Shariq Rizvi (another Google alum). They raised $2 million last fall in a seed round from investors Mike Maples, ex-Verisign CEO Stratton Sclavos, and ex-3Com/Palm chairman Eric Benhamou.