Aug 21 (Reuters) - The chairman of the U.S. Federal

Trade Commission warned Alphabet, Amazon ( AMZN ), Microsoft ( MSFT ) and other

technology companies on Thursday that efforts to comply with

British and European digital content laws could violate U.S. law

if they weaken privacy and data security protections for

American users.

FTC Chairman Andrew Ferguson expressed concerns about the EU

Digital Services Act, and the UK Online Safety Act and

Investigatory Powers Act in letters to the cloud computing,

social media and other tech companies.

"Foreign governments seeking to limit free expression or

weaken data security in the United States might count on the

fact that companies have an incentive to simplify their

operations and legal compliance measures by applying uniform

policies across jurisdictions," he said.