Texas Instruments has announced plans to patch a cryptography flaw in a chip that's used in electronic power meters.

"The weakness resides in TI's Z-Stack software that runs on microcontrollers such as the CC2430," writes The Register's Dan Goodin. "Encryption keys used to protect and authenticate communications between the devices are created using PRNGs, or pseudo-random number generators, that produces data that's trivial to predict, the company has confirmed."

"That could allow attackers to remotely tap in to communications that travel over the grids' dedicated wireless mesh networks," Goodin writes.

Click here to read the article at The Register.