As a result of the recent Twitter hacking cases of several high profile celebrities and organisations, the company has decided to strengthen its security. The new security system will retain the normal password verification procedure and add a feature that requires a PIN when the account is accessed in a new location. The PIN will be randomly generated and sent to the account holder by SMS. A victim of its own success, Twitter has been forced to take the same path as Google, Apple and Facebook that have already adopted similar systems to avoid cyber attacks. A possible motive for this decision is the recent hijacking of the account of news agency Associated Press by the Syrian Electronic Army. The group posted a false tweet claiming an attack on the White House had injured Barrack Obama. Despite a speedy removal of the post and official confirmation of the hoax from the White House shortly after, the US markets fell dramatically for a few minutes. More about: Cyber attacks, Internet, Security, Twitter