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Abstract

A method for loading secret data, such as an application key, on a smart card (6), which involves storing a random key on the card (6), encrypting the random key on the basis of a public key, and providing the encrypted random key to a central processing station (4). The encrypted random key is decrypted at the central station on the basis of a secret key, and the station (4) encrypts data on the basis of the random key and transmits it to the smart card (6). The smart card decrypts the encrypted data on the basis of the random key. The random key can be generated internally and stored on read protected memory (23) of the card (6). The public key encrypting and secret key decrypting steps may be based on the RSA algorithm, using a small encryption exponent.

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First Claim