We construct the first (key-policy) attribute-based encryption (ABE) system with short secret
keys: the size of keys in our system depends only on the depth of the policy circuit, not its size…

Functional encryption (FE) is an extremely powerful cryptographic mechanism that lets an
authorized entity compute on encrypted data, and learn the results in the clear. However, all …

Encrypted database systems provide a great method for protecting sensitive data in
untrusted infrastructures. These systems are built using either specialpurpose cryptographic …

In an Attribute-Based Encryption (ABE) scheme the ciphertext encrypting a message $$\mu
$$ , is associated with a public attribute vector $$\mathbf {{x}}$$ and a secret key $$ \mathsf {…

Quantum Approximate Optimization Algorithm (QAOA) is studied primarily to find approximate
solutions to combinatorial optimization problems. For a graph with $n$ vertices and $m$ …

Traditional zero-knowledge protocols have been studied and optimized for the setting where
a single prover holds the complete witness and tries to convince a verifier about a predicate …

A core enabler for blockchain or DLT interoperability is the ability to atomically exchange
assets held by mutually untrusting owners on different ledgers. This atomic swap problem has …

Designing an ID based signcryption scheme in the standard model is among the most
interesting and important problems in cryptography. However, all the existing systems in the ID …

Encrypted database systems provide a great method for protecting sensitive data in
untrusted infrastructures. These systems are built using either special-purpose cryptographic …

Decentralized exchange markets leveraging blockchain have been proposed recently to
provide open and equal access to traders, improve transparency and avoid single-point-of-…