NICOLE PERLROTH
SAN FRANCISCO — Another month, another major security breach. confirmed Thursday that about 400,000 user names and passwords to Yahoo and other companies were stolen on Wednesday. A group of hackers, known as the D33D Company, posted online the user names and passwords for what appeared to be 453,492 accounts belonging to Yahoo, and also Gmail, , MSN, SBC Global, The hackers wrote a brief footnote to the data dump, which has since been taken offline: “We hope that the parties responsible for managing the security of this subdomain will take this as a wake-up call, and not as a threat.” The breach comes just one month after millions of user passwords for , the online social network for professionals, were exposed by hackers who breached its systems. The breaches h...