Abstract Time-Lock Puzzles (TLPs) are a powerful tool for concealing messages until a
predetermined point in time. When solving multiple puzzles, in many cases, it becomes …

We construct adaptively secure multiparty non-interactive key exchange (NIKE) from
polynomially-hard indistinguishability obfuscation and other standard assumptions. This …

A private puncturable pseudorandom function (PRF) enables one to create a constrained
version of a PRF key, which can be used to evaluate the PRF at all but some punctured …

In this paper, we build a framework for constructing Constrained Pseudorandom Functions
(CPRFs) with inner-product constraint predicates, using ideas from subtractive secret …

摘要伪随机函数(Pseudorandom Function, PRF) 是现代密码学的基本原语之一, 由私钥空间,
定义域空间及值域空间所表达. 一方从私钥空间随机选取一个私钥, 对定义域空间内的任一点 …

Functional Pseudorandom (F-PRF) is a cryptography primitive which extends the standard
Pseudorandom Function (PRF) to be functional, where for any function f, a functional key …

In the driven of big data, social computing and information security is undergoing rapid
development and beginning to cross. This paper describes a key-policy attribute-based …

针对基于多线性映射的属性加密方案存在密文扩展率大, 解密效率低, 密钥托管的问题,
将外包技术和用户秘密值法运用于方案中, 设计了一个密钥策略的多线性映射属性加密方案 …