30 search results - page 5 / 6 » An Efficient Hierarchical Key Management Scheme Using Symmet... |
CCS
2008
ACM
13 years 7 months ago
2008
ACM
By functionally decomposing a specific algorithm (the hierarchical secure aggregation algorithm of Chan et al. [3] and Frikken et al. [7]), we uncover a useful general functionali...
AFRICACRYPT
2010
Springer
13 years 9 months ago
2010
Springer
Abstract. Proxy re-encryption (PRE) allows a semi-trusted proxy to convert a ciphertext originally intended for Alice into one encrypting the same plaintext for Bob. The proxy only...
EUROCRYPT
2009
Springer
14 years 6 months ago
2009
Springer
A group key agreement (GKA) protocol allows a set of users to establish a common secret via open networks. Observing that a major goal of GKAs for most applications is to establish...
IEEECIT
2010
IEEE
13 years 3 months ago
2010
IEEE
Suppose Bob, the boss in Company A, pays a secure cloud storage service and authorizes all the employees in that company to share such a service. There exists a user hierarchy: Bob...
SIAMMAX
2010
13 years 11 days ago
2010
Abstract. Given a symmetric positive definite matrix A, we compute a structured approximate Cholesky factorization A RT R up to any desired accuracy, where R is an upper triangula...