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Uber confirmed it developed a secret program that it used to evade and dupe government investigators and other ride-hailers in cities where it faced regulations or was banned.

But a spokeswoman for the ride-hailing company said on Friday that only in the rarest of cases did it 鈥済reyball鈥� those it suspected of trying to carry out sting operations, canceling their ride requests or displaying digital cars in a fake version of the Uber app that didn鈥檛 represent real vehicles. The spokeswoman told Reuters that in most cases, Uber used the Greyball program,, to deny ride requests from competitors or to protect drivers from physical harm. 聽

News of the program comes after a bumpy stretch for Uber. The ride-hailing company has suffered a series of embarrassments in the last few weeks that include high-profile allegations of sexual harassment, a #deleteUber campaign on Twitter in response to accusations it tried to take advantage of a pro-immigrant taxi strike in New York City, and a video of chief executive Travis Kalanick arguing with an Uber driver that led the CEO to issue a public apology and pledge to 鈥�.鈥澛�

Some observers labeled news of the Greyball program as further evidence of Uber鈥檚 problems both internally and with regulators. But others argue the secret tool does the opposite. They say that while Uber tried to sneak around regulations, Greyball also manifests the problems with regulations imposed on Uber, stymieing opportunities for drivers and economic growth for cities.

鈥淚t's a neat little example of how the regulation of the economy limits, , economic growth,鈥� writes Tim Worstall, a fellow at 聽the Adam Smith Institute,聽a neoliberal think tank based in London, in a contribution to Forbes. 鈥淚n order to operate Uber dodged public officials and regulations, entirely true. But given that Uber is also an increase in economic wealth that's all the proof we need that regulation limits, slows down, economic growth.鈥�

The Greyball program, which an Uber spokeswoman said is still in use today, uses customers鈥� geo-location data, credit-card information, and app-usage and social media habits , including taxi companies, according to the Times report.

The program was reportedly first developed to protect Uber drivers in cities where they faced threats of violence. Uber employees told the Times the practices and tools were developed, in part, to protect drivers in some countries. In France, India and Kenya, for instance, taxi companies and workers targeted and attacked new Uber drivers.

But Uber soon realized it could expand Greyball, part of a program called 鈥淰iolation of terms of service鈥� (VTOS), to sidestep government officials and others in cities where it faced restrictions or was banned. According to the Times, when Uber moved into a new city, it appointed a general manager to oversee the expansion. This person, using a sort-of Greyball playbook, would try to spot and trick enforcement officers and other city officials.

When an account was greyballed, the user was shown either a set of ghost cars in a fake version of the app or no cars at all. If a driver accidentally picked up someone identified as an officer, Uber called the driver with instructions to cancel the ride.

In a statement Uber issued on Friday, it said the program was meant to prevent users from violating its terms of service.

鈥淭his program denies ride requests to fraudulent users who are violating our terms of service, whether that鈥檚 people aiming to physically harm drivers, competitors looking to disrupt our operations, or opponents who collude with officials on secret 鈥榮tings鈥� meant to entrap drivers,鈥� it said.

A spokeswoman for the company also told Reuters that Uber鈥檚 legal department had approved the practice in locations where Uber was not clearly banned, and that Uber鈥檚 terms of use required riders use the app for personal, not commercial, reasons and not to cause 鈥渘uisance鈥� to drivers.

But outside legal experts were unsure the program is, as Uber suggested, legal.聽

鈥淲ith any type of systematic thwarting of the law, you鈥檙e flirting with disaster,鈥� Peter Henning, a law professor at Wayne State University, told the Times. 鈥淲e all take our foot off the gas when we see the police car at the intersection up ahead, and there鈥檚 nothing wrong with that. But this goes far beyond avoiding a speed trap.鈥�

Mr. Henning wondered whether the program violated the federal Computer Fraud and Abuse Act or intentional obstruction of justice, depending on local laws and jurisdictions.

Paul Argenti, a professor of corporate communications at Dartmouth College鈥檚 Tuck School of Business, told the Post that news of the program only adds to Uber鈥檚 internal strife.

鈥淭his is a really bad month. The number and kind of problems they have is an unusual array of bad luck and bad behavior combined,鈥� he said. But he added Uber could recover.

As Uber has grown in popularity since it was founded in 2009, officials in certain cities without a legal framework for ride services aimed to ticket, tow, and impound cars. In Uber鈥檚 case, these cars were often part of its lower-cost UberX service, private cars driven by noncommercial drivers who passed a background test and a vehicle inspection.

Federal regulators have often tried to grapple with how to deal with these cars and drivers and other similar ride-hailing models. In the United States, Congress debated the issue . The European Union also warned member states in June such as Uber and Airbnb, according to The Wall Street Journal. The EU published these guidelines in an effort to encourage the so-called sharing economy, which it sees as promoting entrepreneurship and startups, according to the Journal. And in China, ride-hailing company Didi , in a rare departure from Chinese business practices, according to the Journal.

But cybersecurity analysts say the Greyball program also shows the need for a different type of regulation related to the sharing economy.

"Greyballing is an acceptable business risk in the poorly-governed realm of cyberspace," Kenneth Geers, a former analyst at the National Security Agency and a senior research scientist at Comodo, a global cybersecurity firm, told the Post.聽

This report contains material from Reuters.聽