Chinese computer manufacturer Lenovo Group Ltd. has signed a nondisclosure deal with BlackBerry Ltd. to examine its books in advance of a potential bid for part of the Canadian company, the Wall Street Journal reported Friday. In a report that cited anonymous sources, WSJ said that Lenovo was likely to “pursue just parts” of BlackBerry due to “regulatory obstacles” it could face if it bid to acquire the entire company. Security experts the paper consulted said BlackBerry’s handset business could be sold to “an Asian device maker,” while its secure network is more likely to go to “a North American entity” due to security concerns. Industry Canada denied last week Accelero Capital Holdings' $520-million deal to acquire Allstream...