We have been working with 7-zip form some time as matter fact was recommend by EE, we use it for large compression and complex-long password protected files. Today in a meeting we were informed that 7-zip can be hacked. We didn't believe until the person ran an apps and unzip one of our supposedly secure 7-zip files. So our question is which compression apps is least to be hacked (WinZIp, WinRar, etc.?), which one can we trust? Is the oldies WinZip & WinRar also hacked?.