To provide an information transmission method and an information transmission device, capable of responding to increase in information for CRTM to be updated, for providing a method for updating CRTM, without needing addition of special hardware for realizing the method.
The information update method for updating CRTM that is a base of chain authentication by use of an information processor adapting the system of ensuring the validity of the whole information processor by performing the chain authentication comprises steps of extracting update CRTM that is information of the CRTM of information to be updated; storing the update CRTM in a main memory of the information processor; authenticating the update CRTM stored in the main memory; and updating the CRTM with the authenticated CRTM.
| WO/2001/017198 | SECURE TRANSACTION MODEM |
| WO/2003/075271 | METHOD AND SYSTEM FOR PLAYING A SONG IN DEPENDENCE UPON PERSONALISED DIGITAL AUDIO DATA. |
KASAMATSU EITARO
MATSUSHIMA SHINJI
KONO SEIICHI
Yoshihiro City
Takeshi Ueno
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