cTPM: a cloud TPM for cross-device trusted applications

• Autores: Chen Chen, Himanshu Raj, Stefan Saroiu, Alec Wolman
• Localización: ;login:: the magazine of USENIX & SAGE, ISSN 1044-6397, Vol. 39, Nº. 4, 2014 (Ejemplar dedicado a: Security), págs. 28-34
• Idioma: inglés
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• Resumen

  • Current Trusted Platform Modules (TPMs) are ill-suited for use in mobile services because they hinder sharing data across multiple devices seamlessly, they lack access to a trusted real-time clock, and their non-volatile storage performs poorly. We present cloud TPM (cTPM), an extension of the TPM’s design, to address these problems. cTPM includes two features: a cloud seed shared between the TPM and the cloud, and remote storage in addition to the on-chip storage. cTPM allows the cloud to create and share TPM-protected keys across multiple devices, to manage a portion of a mobile device’s TPM storage, and to provide each TPM with a trusted real-time clock and with high-performance non-volatile storage.