Washington has the right to block US federal agencies from buying products by Huawei on cybersecurity grounds, a judge has ruled, dismissing the Chinese telecom giant's legal challenge to a purchase ban.

Rising interest in electronic voting has heightened concerns among security experts who fear these systems are vulnerable to hacking and manipulation that could undermine confidence in election results.

Huawei was hit with US criminal charges in a 16-count indictment alleging a "decades-long" effort to steal trade secrets from American companies.

US and German intelligence services raked in the top secret communications of governments around the world for decades through their hidden control of a top encryption company, Crypto AG, US, German and Swiss media reported Tuesday.

Iran repelled a cyberattack on Saturday that disrupted the country's internet services for an hour, a telecommunications ministry official said.

US officials and cyber experts warned Tuesday that the voting debacle in the Democratic caucuses in Iowa underscored the vulnerabilities in the country's election infrastructure in everything from hacking to trust-eroding conspiracy theories.

The United States has welcomed the European Union's new rules on fifth-generation internet but pressed them to go further after the bloc resisted Washington's pressure to ban China's Huawei directly.

Facebook said a new tool allowing users of the social network to view and delete data it collects from third parties is rolling out to the estimated two billion members of the leading social network worldwide.

Rui Pinto, the Portuguese self-taught hacker already tied to the "Football Leaks", has now come forward as the source of the spectacular "Luanda Leaks" revelations.

Britain is expected to announce next week whether to allow China's Huawei to develop its 5G network, an official said on Friday, setting out reasons for agreeing despite US opposition.

The United States pressed France on Wednesday to take "strong security measures" against potential breaches from 5G services provided by Chinese telecommunications firm Huawei, saying failure to do so could imperil intelligence exchanges.