Top stories
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Twitter's IPO: nine things we've learned
Twitter has revealed its initial public offering details and with it a wealth of facts on the seven-year-old company. By Samuel Gibbs
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NSA and GCHQ target Tor network
Agencies have failed to break core security of network but have limited success in attacking users' computers. By James Ball, Bruce Schneier and Glenn Greenwald
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GTA Online: Rockstar launches PS3 fix
Keith Stuart: Free download should solve many of the problems PlayStation 3 players are facing – and an Xbox 360 fix is coming soon
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Adobe warns 2.9m customers of data breach
Software company discloses hack and advises customers that names and encrypted credit card numbers may have been stolen
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Review: Tesco Hudl – a lot of tablet for your money
The 'Hudl' tablet is Tesco's 7in affordable-but-good Android challenge to the American giants of Amazon's Kindle Fire and Google's Nexus 7 tablets. By Samuel Gibbs
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Bitcoin: what you need to know
The crypto-currency is back in the news after the closure of Silk Road. But what is Bitcoin? By Alex Hern
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BioShock Infinite: Burial at Sea – preview
Revisiting Rapture before its fall will have fans of the original game in … well … raptures. By Nick Cowen
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The easiest way to send texts from a PC
Jack Schofield: Carol is going away and wants her elderly relatives to be able to send SMS messages to her mobile phone
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20 best iPhone and iPad apps this week
The Wagner Files HD, Grazia UK, NBA 2K14, Marvel Puzzle Quest, Goodnight Mo, The Cave, Michelin Guide 2014, Artsy, Pumatrac, Transport Tycoon and more. By Stuart Dredge
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20 best Android apps this week
The Washington Post, Marvel Puzzle Quest, The Love Book, Edge: Quick Actions, Pinball Rocks HD, Medieval Math Battle, Feral Pigeon Project and more. By Stuart Dredge
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iPhone 5S fingerprint spoof could lead to ID theft, German researchers says
A German security company has demonstrated that it can spoof the iPhone 5S's fingerprint reader, and says that it can beat the "remote wipe" facility to carry out identity theft. By Charles Arthur
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US indicts 13 suspected members of Anonymous hacking collective
Indictment filed in US district court in Virginia charges that members attacked government and credit card websites
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Samsung Galaxy Note 3 review
The latest Android 'phablet' is bigger, faster and offers great battery life. By Samuel Gibbs
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iPhone 5s or 5c: which blends better?
They're new, made of metal and plastic, and cost upwards of £469, but will the iPhone 5s or iPhone 5c blend better?
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BlackBerry will burn through most of its cash in 18 months, says analyst
Pierre Ferragu at Bernstein Research says smartphone maker BlackBerry will face 'material liquidity problems'
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Lockwatch app photographs your phone's thief
The Android app is designed to help identify thieves, but could have repercussions for the second-hand market. By Alex Hern
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Moshi Monsters firm looks to mobile
Virtual world for children doubled its turnover from licensed products and ended the year with 70m registered users. By Stuart Dredge
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From search to security: the five most important algorithms in tech
Algorithms such as those run by Google are the brains of the internet, encrypting data and helping us navigate online. By Alex Hern
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The moral dilemma of in-game war crimes
Keith Stuart: The Red Cross has told the BBC that it wants military-themed video games to adhere to real-life international laws, punishing player characters for war crimes. Is this feasible?
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Tom Clancy – a video game maker too
Keith Stuart: The hugely successful author, who died on Tuesday, is being remembered for his blockbusting military novels, but one key element of his career is being overlooked: video games
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7 Digital's Ben Drury on the online music world
Video (9min 35sec) Tech Sessions: Co-founder of digital music platform that provides access to more than 23m tracks talks to Jemima Kiss
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UK to create first internet-connected road
Technology on busy road connecting Birmingham and Felixstowe could pave way for self-driving cars
More Technology news
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Lavabit founder raises $20,000 for court battle
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Apple promises iOS 7 fix for users affected by iMessage problems
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With 4.5m active fans, The Football App wants to be 'the Facebook of football'
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Microsoft investors 'pressing for Gates to go'
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Apple's iPad 5: what to expect
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All today's technology stories