SAN FRANCISCO — Every once in a while, an email or Facebook posting makes the rounds sounding alarms over the supposed danger of used hotel card keys. To stay safe, the reasoning goes, travelers must ...

The next time you stay in a hotel room, run your fingers under the keycard lock outside your door. If you find a DC power port there, take note: With a few hacker tricks and a handful of cheap ...

Technology that allows hotel guests to use their phones as room keys is expanding, taking aim at those environmentally unfriendly plastic cards. By Karen Schwartz The demonstration using the cellphone ...

Some technologies are so smart and simple, it's just plain stupid not to implement them. I was recently in the Czech Republic where the two hotels I stayed in require guests to insert their card key ...

The latest thing is a “key” that isn’t even a fob — the thing that has largely replaced the physical keys that used to be the way you started a car or unlocked its doors, as by inserting them and ...