Richi Jennings Industry analyst and editor, RJAssociates This week brings yet more examples of poor design. Specifically: Two apps trusting phone numbers without properly authenticating the actual user. First, a deadly denial-of-service attack on WhatsApp, in which combining two subtle side effects can lock out users from their accounts. And second, a really dumb authentication bug in a wireless provider’s app. Watch out—these things come in threes. In this week’s Security Blogwatch, we got the 411 (ask your parents). Your humble blogwatcher curated these bl...