公开(公告)号：EP2896154A1

公开(公告)日：2015-07-22

申请号：EP12884449.5

申请日：2012-09-13

申请人： Nokia Technologies Oy

发明人： LEPPANEN, Kari J. ,  GINZBOORG, Philip ,  KULMALA, Janne ,  LAINE, Antti ,  HANNIKAINEN, Marko

IPC分类号： H04L9/00 ,  H04W12/00

CPC分类号： H04L9/0866 ,  H04L9/0869 ,  H04L63/0435 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04 ,  H04W84/18

摘要： A method for establishing an encrypted communication channel is described. Query IDs are generated at a first device. Each query ID identifies a keyword in a set of keywords. Query IDs are received, at a second device. A second set of keywords is determined by the second device based on the query IDs. Match IDs are determined based on the second set. Each match ID identifies a keyword in the second set. An encryption key is generated based on the second set. A response is sent which includes the match IDs and an encrypted message. At the first device, the second set is determined based on the match IDs. The second set includes keywords of the first set of keywords identified by the match IDs. The encryption key is generated at the first device and the encrypted message is decrypted. Apparatus and computer readable media are also described.