Today's Tech: Hackers try to steal millions from Santander bank and pre-Halloween Google Nexus 5, Android KitKat launch rumoured

Four men have been charged and appeared in court following an attempt to hack the computer systems at a Santander bank branch and steal millions of pounds. It is alleged that one of the group posed as an IT engineer in order to fit a computer with a keyboard video mouse (KVM) at the Surrey Quays shopping centre branch in south east London. If successful, it is believed the KVM would have allowed the gang to access all the computers at the branch. In statement Santander said "no money was ever at risk" and that no employee was involved.

Saudi billionaire Prince Alwaleed bin Talal, who invested $300 million (£190 million) in Twitter two years ago, has said he won't be selling any of his share when the firm goes public. Twitter announced that it had filed for an initial public offering (IPO) last week, in a move to pay back its numerous investors who have pumped millions into the company. Alwaleed also revealed that he expects the IPO to happen by the end of this year or early in 2014. Twitter is expected by analysts to reach a valuation over $10 billion (£6.3 billion) once it is listed, however Alwaleed said he believes there is potential for this to be much higher.

The latest Android operating system, KitKat 4.4 will be announced along with the new Nexus 5 smartphone on 14 October, it has been rumoured. At the moment Google has only given October as the time KitKat will be released, following the unveiling of the OS at the beginning of September. Now, tipsters have told ausdroid.net that the big launch will come in mid October, although the site does say it is taking the rumour with a pinch of salt. The company has not yet even mentioned the existence of a Nexus 5 device yet, but new Google regulatory filings released by the Federal Communications Commission last week, appear to show a fully assembled new Google smartphone.

A new report from the New York Times indicates that Nokia was allegedly testing out its own Android-powered devices "well before" the company's initial acquisition talks with Microsoft. While the undisclosed sources indicate that Microsoft's executives knew about Nokia's dabbling — specifically, running Android on its Lumia smartphones — it's unclear whether the move made an official appearance at the two companies' negotiating table. You can bet, however, that the possibility of Nokia jumping ship to Android was in Microsoft executives' minds. After all, Nokia handsets make up 80 per cent of all Windows Phone smartphones sold.