Four men accused of using automated software to buy tickets for scalping have been charged with fraud, conspiracy and computer hacking. They allegedly made more than $25 million from the scam.

"They are accused of hiring programmers in Bulgaria to create a nationwide network of computers that impersonated individual visitors to the ticket vendor sites, flooding the sites at the exact moment that the tickets went on sale," writes CNET News' Elinor Mills.

"The network of computers, dubbed Captcha bots, automated and sped up the buying process by completing Captcha tests the sites presented that were designed to keep automated bots off the sites," Mills writes. "The men also are accused of creating shell corporations with fake domains and e-mail addresses and aliases to deceive the online ticket vendors."

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