China spy chips report threatens Pentagon's $10-billion defence contract

Amazon was among almost 30 companies including Apple Inc.whose servers were infiltrated

Tech providers vying for a $10 billion Defense Department cloud-computing contract may come under added pressure to prove their systems are secure after a report that China sneaked spy chips onto servers used by US companies including Amazon.com Inc., a top contender for the Pentagon award.

Amazon, the market leader in cloud-computing services, was among almost 30 companies including Apple Inc.whose servers were infiltrated according to a Bloomberg Businessweek report based on more than a dozen sources in the government and private sector.

Apple, Amazon, server component seller Super Micro Computer Inc. and the Chinese government denied the report. When asked for