This paper analyzes the secure access delegation problem, which occurs naturally in the
cloud, and postulate that Proxy Re-Encryption is a feasible cryptographic solution, both from …

USU, Illed on Sep. 13, across a plurality of repositories. The method further includes (51) Int.
Cl allowing the subscriber authority to sub-provision the trust itouL o/32(2006.01) worthy …

Methods, systems, and computer-readable storage media for proxy re-encryption of
encrypted data stored in a first database of a first server and a second database of a second …

Methods, systems and apparatuses for providing trustworthy workflow across trust
boundaries are disclosed. One method includes a curator generating a first public key (PK …

An encryption device (200) outputs a ciphertext cto in which is set one of attribute
information X and attribute informa tion Vo corresponding to each other. A decryption device …

A system and a method for managing confidential data in a cloud service is provided. The
system comprises a cryptographic key service comprising two or more cryptographic key …

(57) ABSTRACT A web of trust in a distributed system is established. A root of trust for at
least two components in the distributed system validates information for the distributed …

This paper analyzes the secure access delegation problem, which occurs naturally in the
cloud, and postulate that Proxy Re-Encryption is a feasible cryptographic solution, both from …

Proxy re-encryption (PRE) is a system which allows decryption rights for ciphertexts to be
delegated to third par ties without decrypting the ciphertexts. Non-Patent Literature 1 …

An encryption device 200 outputs a ciphertext ct including a ciphertext c and a ciphertext c.
The ciphertext c has been set with one of attribute information x and attribute information v …