ironically in 2008, just before the introduction of the iphone, lonovo sold its phone business. meantime, companies who give employees a smartphone are taking on greater risk. a study by the ponemon institute finds 75% of i-t professionals have smartphone security concerns, a jump from 9% in 20-10. due to the rise of employees using the devices for work, smartphones are considered the biggest threat to a companies' security in 2014. other big i-t threats at work include email scams and malware attacks. target now confirms encrypted pin data was stolen in that huge holiday hacking scheme. but in a statement the third largest retailer says, "we remain confident that pin numbers are safe and secure." still, several class action lawsuits have been filed on the possibility the crooks will find a way to use encryped pins.hackers stole data from as many as 40 million credit cards twitter shares tumbled after an analyst downgrade on friday. ben schachter a macquarie capital analyst, said twitter stock was going too, far, too fast, according to reports.he dropped his rating from neutral