>> reporter: tonight apple is defending siri and its popular voice assistant on iphone, ipad, and apple watch faces new criticism. an anonymous whistle blower told "the an anonymous whistle blower told "the guardian" newspaper that human contractors can sometimes listen to what siri hears. among the chatter, confidential medical conversations, drug deals, and even intimate moments according to the whistle blower. confirmed the story, but apple did not deny the allegation, telling us it uses the recordings to make nbc news has not confirmed the story, but apple did not deny the allegation, telling us it uses the recordings to make siri work better, adding only a very small random subset, less than 1% of daily siri utterances, are used to improve siri and dictation. but with 15 billion siri commands made every month, ten of millions could be listened tong siri recordings are apple responded saying siri recordings are not attached to your apple user name or other identifying information, adding that all reviewers are under the obligation to adhere to apple's strict confidentiality requirement. strict confidentiay