An online "sextortionist" coerced as many as 350 women -- some of them minors -- into stripping for him, and then used the nude photos to blackmail them into continuing to strip, federal authorities said.

Karen "Gary" Kazaryan, 27, of Glendale, Calif., is charged with 15 counts of computer intrusion and 15 counts of aggravated identity theft, according to a federal indictment.

Authorities found approximately 3,000 pictures of nude or semi-nude women on Kazaryan's computer, which appeared to have been stolen from the personal accounts of women or taken by Kazaryan on Skype, an FBI release said.