Microsoft has announced it received between 6,000 and 7,000 criminal and national security warrants, subpoenas and orders from US government agencies in the last six months of 2012.
The firm said the requests from local, state and federal level affected between 31,000 and 32,000 consumer accounts.
The software firm disclosed the data after a deal was reached with US national security authorities about such disclosures.
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Speaking after the Westminster attack, Brad Smith exclusively told ITV News that Microsoft will only hand over data when legally compelled.
Kurt Cochran and his wife Melissa had been visiting London from the US to celebrate their 25th wedding anniversary and were due to fly home.
The Government has previously described the new coin - which enters circulation tomorrow - as "harder to counterfeit than ever before".