Simple forward-secure signatures from any signature scheme
Proceedings of the 7th ACM conference on Computer and communications security
Yaksha: augmenting Kerberos with public key cryptography
SNDSS '95 Proceedings of the 1995 Symposium on Network and Distributed System Security (SNDSS'95)
Networked Cryptographic Devices Resilient to Capture
SP '01 Proceedings of the 2001 IEEE Symposium on Security and Privacy
Mobile device protection from loss and capture
Proceedings of the 1st international conference on PErvasive Technologies Related to Assistive Environments
Traitor tracing schemes for protected software implementations
Proceedings of the 11th annual ACM workshop on Digital rights management
Fine grained control of security capability and forward security in a pairing based signature scheme
ICCSA'05 Proceedings of the 2005 international conference on Computational Science and Its Applications - Volume Part II
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Mediated RSA (mRSA) [1] is a simple and practical method of splitting RSA private keys between the user and the Security Mediator (SEM). Neither the user nor the SEM can cheat each other since a signature or a decryption must involve both parties. mRSA allows fast and fine-grained control (revocation) of users' security priviliges. Forward security is an important and desirable feature for signature schemes. Despite some notable recent results, no forward-secure RSA variant has been developed. In this paper (abstract), we show how weak forward security can be efficiently obtained with mediated RSA. We consider several methods, based on both multiplicative and additive mRSA and discuss their respective merits.