A message deciphering method

专利名称：A message deciphering method发明人：Sannino, Roberto Valerio,Sozzani,

Fabio,Bertoni, Guido Marco,Pelosi,Gerardo,Fragneto, Pasqualina

申请号：EP03425824.4申请日：20031224公开号：EP1548976A1公开日：20050629

专利附图：

摘要：A method for decrypting the encrypted messages sent by a transmission deviceto a first electronic device (SIM) associated with a first trusted authority (TA-SIM) and to a

second electronic device (ME). The method comprises the steps of: a) associating a singlejoint identity with the first (SIM) and the second (ME) devices which is identificative of acommon entity comprising the first (SIM) and the second (ME) devices;b) carrying out asingle encryption operation of a message by the transmission device, by using the jointidentity and transmitting the encrypted message to both devices;c) generating first(WSIM) and second (WME) decryption tokens by the first (SIM) and the second (ME)devices, respectively;d) providing said first token to the second device and said secondtoken to the first device;e) generating, by starting from said tokens, by the first andsecond devices, of a joint decryption key (W) in order to decrypt the encrypted message.

申请人：STMicroelectronics S.r.l.

地址：Via C. Olivetti, 2 20041 Agrate Brianza (Milano) IT

国籍：IT

代理机构：Siniscalco, Fabio

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