If you’ve been to DEF CON or any number of other technical hacker conferences, you’re familiar with Capture the Flag contests. These events pit teams of hackers and researchers against each other in a series of challenges until a winner is determined. Capture the Flag is also a valuable teaching tool, providing some with hands-on...

Popular collaboration and communication firm Slack rushed to plugged a security hole in its platform Thursday that was leaking some of its users’ private chats and files for anyone to access. Slack, a leading tool used by companies to communicate internally, was alerted by security firm Detectify Labs who discovered Slack users were unwittingly sharing sensitive company...