Cloud computing will soon become an area of hot debate in Washington, D.C., with policy makers debating issues such as the privacy and security of data in the cloud, a panel of tech experts said Friday.

There are "huge challenges" facing policy makers in the next year or two as cloud computing becomes increasingly popular, said Mike Nelson, visiting professor for the Center for Communication, Culture and Technology at Georgetown University and a former tech policy advisor for U.S. President Bill Clinton.

Among the major policy issues to be worked out: Who owns the data that consumers store on the network? Should law enforcement agencies have easier access to personal information in the cloud than data on a personal computer? Do government procurement regulations need to change to allow agencies to embrace cloud computing?

Cloud computing is "as important as the Web was 15 years ago," said Nelson, speaking at a Google forum on the policy implications of hosted applications and services. "We don't have any idea of how important it is, and we don't really have any clue as to how it's going to be used."

Despite the growing number of people using cloud services such as hosted e-mail and online photo storage, many consumers don't understand the privacy and security implications, said Ari Schwartz, vice president and chief operating officer of the Center for Democracy and Technology, an advocacy group focused on online privacy and civil rights. So far, U.S. courts have generally ruled that private data stored in the cloud doesn't enjoy the same level of protection from law enforcement searches that data stored on a personal computer does, he said.

"Consumers expect their information will be treated the same on the cloud as it is if it were stored at home on their own computers," Schwartz said.

Forty-nine percent of U.S. residents who use cloud computing services would be very concerned if the cloud vendors shared their files with law enforcement agencies, according to a survey released Friday by the Pew Internet and American Life Project. Another 15 percent of respondents said they'd be somewhat concerned, according to the survey, released in conjunction with the Google policy event.

Sixty-nine percent of U.S. residents who are online use at least one of six popular cloud services, the survey said. Fifty-six percent of survey respondents use Web mail services, 34 percent store personal photos online and 29 percent use online applications such as Google Documents or Adobe Photoshop Express, according to the survey.