Patent ID: 8825997
Filing Date: 2014-09-02
Classification: H04L

Abstract:
1. A method comprising: receiving a first message, a second message and a condition at a first time instance; encrypting the first message with a first encryption key; encrypting the second message with a second encryption key; sending the first and the second encrypted message to a recipient message system; receiving a request from the recipient message system at a second time instance for sending one of two decryption keys corresponding to either the first or the second encryption key; and sending the first decryption key or the second decryption key depending on the condition to the recipient message system, wherein the condition has at least three distinct evaluation states, wherein a set of at least three messages, one corresponding to each of the at least three different evaluation states is sent to the recipient message system, wherein each of the set of at least three messages has a message specific decryption key, wherein only the decryption key corresponding to a determined evaluation state of the condition is sent to the recipient message system.