Yahoo hack affects more than 1 billionSAN FRANCISCO — Yahoo has become the worst-case example of an unnerving but increasingly common phenomenon — massive hacks that steal secrets and other potentially revealing information from our personal digital accounts, or from big organizations that hold sensitive data on our behalf.On Wednesday, Yahoo disclosed a gargantuan breach affecting more than a billion user accounts, the largest such attack in history.The company said that attack happened in August 2013, although Yahoo only discovered it recently. Worse, the company’s announcement followed a similar announcement in September of a 2014 hack that affected 500 million accounts.Neither breach has yet been linked to online fraud or any specific repercussions for Yahoo users.

GM to invest in 3 New York plantsTONAWANDA, N.Y. — General Motors will spend $334 million to upgrade three plants in upstate New York, company executives and state officials said Wednesday.The money will pay for new equipment and machinery needed to produce next-generation engines and other automotive components at factories in Tonawanda, Lockport and Rochester.New York state agreed to provide up to $7 million in grants and tax breaks to support the upgrades. State officials say the company’s investment will create 67 new jobs at Tonawanda and protect more than 1,200 jobs overall.Detroit-based General Motors employs 4,200 people in manufacturing jobs around New York state. Cathy Clegg, vice president for manufacturing and labor relations for GM-North America, said the upgrades at the upstate New York plants are part of a $2.2 billion General Motors plan to invest in U.S. operations.The plant in Tonawanda will receive nearly $296 million.