Security experts have found a way to tap the radio signals of wireless keyboards. Microsoft's Optical Desktop 1000 and 2000 are vulnerable. because of a Texas Instruments TRF7900A chip which transmits at 27 MHz with only an 8-bit code. The weakness is already known to Microsoft. The only solution is to change the hardware, and coming generations of wireless devices should be protected. Blue tooth devices are not affected by the loophole. But hackers could soon break into the higher security of newer wireless keyboards too.