Abstract:
A method for encrypting information that is transferred between two communication units such as mobile telephones, personal computers, palm-top computers, etc., where a security module is present in each mobile telephone and where a security application contains encryption and decryption algorithms. The invention is characterised in that the security application is caused to be stored on an SD card (2) that is caused to be introduced into a card-holder location in the relevant mobile telephone (1), in that the security application is caused to be transferred from the SD card (2) to the security module (4) of the mobile telephone (1) in addition to a session key stored on the SD card, in that a key stream is caused to be formed in the SD card (2) on the basis of the session key, in that the key stream is caused during encryption to be transferred from the SD card (2) to the security module (4) of the mobile telephone, in that the encryption is caused to take place in the security module (4) of the mobile telephone (1), after which such an encrypted stream of data is transmitted by the mobile telephone, in that the stream of data is received by a second mobile telephone, in that decryption is caused to take place with the aid of a corresponding key stream in the security module (4) of the second mobile telephone and in that the said corresponding key stream is caused to be formed in the SD card (2) of the second mobile telephone on the basis of the said session key.
Abstract:
Method for verifying electronic transactions. A transaction is initiated by a user interacting with a transaction source. The transaction source transfers un unverified transaction request to the user's mobile phone. The user can either deny or approve the transaction. If the transaction is approved, the user enters a pin-code and a security module in the mobile phone signs the transaction request with an electronic id. The signed transaction request is sent to a computer which verifies the transaction request with a verification system.