公开(公告)号：US20170310646A1

公开(公告)日：2017-10-26

申请号：US15621762

申请日：2017-06-13

Applicant: STMicroelectronics S.r.I.

Inventor： Agostino Vanore ,  Vitantonio Di Stasio

IPC: H04L29/06 ,  H04L9/14 ,  H04W4/00 ,  H04W12/08 ,  H04W12/10 ,  H04W12/04 ,  H04W12/12

CPC classification number: H04L63/0435 ,  H04L9/14 ,  H04L63/123 ,  H04L63/1475 ,  H04L2209/20 ,  H04L2209/34 ,  H04L2209/80 ,  H04W4/50 ,  H04W4/60 ,  H04W12/04 ,  H04W12/08 ,  H04W12/10 ,  H04W12/12

Abstract: A method is to detect a message compatible with the OTA (Over The Air) standard and affected by a wrong ciphering. The method may include receiving the ciphered OTA message; deciphering the OTA message; and reading a counter field of padding bytes in the deciphered OTA message and reading corresponding padding bytes in the OTA message deciphered. The method may also include detecting at least one bit in at least one of the padding bytes of the OTA message deciphered, with the at least one bit being indicative of the wrong ciphering.