Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Ananth, Prabhanjan"'
We study the (in)feasibility of quantum pseudorandom notions in a quantum analog of the random oracle model, where all the parties, including the adversary, have oracle access to the same Haar random unitary. In this model, we show the following: - (
Externí odkaz:
http://arxiv.org/abs/2410.19320
Fundamental principles of quantum mechanics have inspired many new research directions, particularly in quantum cryptography. One such principle is quantum no-cloning which has led to the emerging field of revocable cryptography. Roughly speaking, in
Externí odkaz:
http://arxiv.org/abs/2410.13163
Common random string model is a popular model in classical cryptography. We study a quantum analogue of this model called the common Haar state (CHS) model. In this model, every party participating in the cryptographic system receives many copies of
Externí odkaz:
http://arxiv.org/abs/2407.07908
Unclonable cryptography utilizes the principles of quantum mechanics to addresses cryptographic tasks that are impossible classically. We introduce a novel unclonable primitive in the context of secret sharing, called unclonable secret sharing (USS).
Externí odkaz:
http://arxiv.org/abs/2406.11008
Unclonable cryptography is concerned with leveraging the no-cloning principle to build cryptographic primitives that are otherwise impossible to achieve classically. Understanding the feasibility of unclonable encryption, one of the key unclonable pr
Externí odkaz:
http://arxiv.org/abs/2405.10274
Common random string model is a popular model in classical cryptography with many constructions proposed in this model. We study a quantum analogue of this model called the common Haar state model, which was also studied in an independent work by Che
Externí odkaz:
http://arxiv.org/abs/2404.05227
Autor:
Ananth, Prabhanjan, Behera, Amit
We explore a new pathway to designing unclonable cryptographic primitives. We propose a new notion called unclonable puncturable obfuscation (UPO) and study its implications for unclonable cryptography. Using UPO, we present modular (and arguably, si
Externí odkaz:
http://arxiv.org/abs/2311.11890
We introduce a new notion called ${\cal Q}$-secure pseudorandom isometries (PRI). A pseudorandom isometry is an efficient quantum circuit that maps an $n$-qubit state to an $(n+m)$-qubit state in an isometric manner. In terms of security, we require
Externí odkaz:
http://arxiv.org/abs/2311.02901
We study the problem of watermarking large language models (LLMs) generated text -- one of the most promising approaches for addressing the safety challenges of LLM usage. In this paper, we propose a rigorous theoretical framework to quantify the eff
Externí odkaz:
http://arxiv.org/abs/2306.17439
We study the relationship between notions of pseudorandomness in the quantum and classical worlds. Pseudorandom quantum state generator (PRSG), a pseudorandomness notion in the quantum world, is an efficient circuit that produces states that are comp
Externí odkaz:
http://arxiv.org/abs/2306.05613