Today's Tech: New Hudl on the way, Obama defends PRISM, and Microsoft sinkholes the ZeroAccess botnet

Fifty shades of startup

The Future Fifty tech startup-support programme has announced the second group of 25 tech companies that will be provided with public and private sector support to help fast-track their growth. The government-backed programme is designed to boost the visibility of high growth technology companies and provide them with exposure to institutional investors.

Zero tolerance for ZeroAccess

Microsoft and law enforcement agencies have successfully disrupted ZeroAccess, one of the world's largest and most rampant botnets. Working alongside the FBI, Europol's European Cybercrime Centre and leaders in the technology industry, Microsoft claims to have "significantly" affected the botnet's operation in a way that will increase the cost and risk for cybercriminals using it.

Pivotal roll into the Silicon Roundabout

Californian startup success story Pivotal Labs today opened a brand new office at the heart of Tech City, and invited members of the press to come and take a look.

The new offices at Bentima House, 168-172 Old Street, signal the beginning of a planned $100 million (£61.2 million) investment by the agile development company in London's burgeoning technology community.

The new hub will be the company's headquarters for Europe, the Middle East and Africa (EMEA).

Hudl da man

Tesco today announced that it's prepping a second version of its Hudl tablet as the phenomenal success of its budget offering shows no signs of dissipating. An enhanced version of the tablet computer will be released in 2014 after the current Hudl sold out twice since its release, with sales topping 300,000.

"The new model will be an enhanced version," said Tesco's chief executive, Philip Clarke, according to the Guardian, before adding that it had sold "more than we had originally planned in total in the run-up to Christmas."

It's for your own good

US president Barack Obama has defended the National Security Agency (NSA) following the latest spying revelations, but says he intends to propose some reforms that can "give people more confidence".

Responding to a report in the Washington Post that the NSA is gathering five billion mobile phone records each day - potentially the largest surveillance programme of its kind in terms of both size and scale – Obama claimed the agency did well to not engage in domestic surveillance.

Check back tomorrow for another edition of Today's Tech - our breakdown of the biggest technology and IT news stories of the day.