Open generic tamper resistant CPU and application system thereof

A central processing unit (GT) comprises a private key in secrecy, and an encryption engine. Before the GT executes software, a license added to the software is entered into the GT. The license includes information obtained by encrypting a code encryption key used when the software is encrypted with...

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Bibliographic Details
Main Authors Hatakeyama, Takahisa, Maruyama, Hidefumi, Ushiwaka, Keiichi, Hasebe, Takayuki, Maeda, Naoaki, Suga, Atsuhiro
Format Patent
LanguageEnglish
Published 13.05.2004
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Summary:A central processing unit (GT) comprises a private key in secrecy, and an encryption engine. Before the GT executes software, a license added to the software is entered into the GT. The license includes information obtained by encrypting a code encryption key used when the software is encrypted with a public key pairing with the private key. When the license is entered, the encryption engine obtains the code encryption key by decrypting the license with the private key, and decrypts the software with the code encryption key.