In 1998, Blaze, Bleumer, and Strauss (BBS) proposed an application called atomic proxy re-
encryption, in which a semitrusted proxy converts a ciphertext for Alice into a ciphertext for …

Today's technical and legal landscape presents formidable challenges to personal data
privacy. First, our increasing reliance on Web services causes personal data to be cached …

We revisit the problem of protecting user's private data against adversarial compromise of
user's device (s) which store this data. We formalize the solution we propose as Password …

We introduce a new method of achieving intrusion-resilience in the cryptographic protocols.
More precisely we show how to preserve security of such protocols, even if a malicious …

In this paper, we discuss non-interactive updating of decryption keys in identity-based
encryption (IBE). In practice, key revocation is a necessary and inevitable process and IBE is …

A configuration for encapsulating data that is unreadable after a predetermined timeout. To
encapsulate data a random data key is generated and split into shares. A threshold number …

Security is constantly been infringed by inadvertent loss of secret keys, and as a solution,
Dodis, Katz, Xu, and Yung [11], in Eurocrypt 2002, proposed a new paradigm called key …

Revocation and key evolving paradigms are central issues in cryptography, and in PKI in
particular. A novel concern related to these areas was raised in the recent work of Sahai …

We consider the problem of efficient key management and user revocation in cryptographic
file systems that allow shared access to files. A performance-efficient solution to user …

We construct an intrusion-resilient symmetric-key authenticated key exchange (AKE)
protocol in the bounded retrieval model. The model employs a long shared private key to …