Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Multimedia Tools and Applications

Post-quantum secure recipient revocable broadcast encryption supporting anonymity

Amit Kumar Singh, Kamalesh Acharya, Sourav Mukhopadhyay

Published May 25, 2023• 1 citation
Publisher
DOI
10.1007/s11042-023-15435-5

Related papers

A post-quantum conditional identity-based broadcast proxy re-encryption scheme with anonymity and revocation

Gautam Kaushik, Manish Garg

Journal of Information Security and Applications•Jun 28, 2026•0 citations

Post-Quantum Secure Public Key Broadcast Encryption with Keyword Search.

Yang Yang, Shu-Lve Yang, Fenghe Wang +1 more

Journal of information science and engineering•Jan 1, 2017•5 citations

Anonymous Lattice-Based Broadcast Encryption

Adela Georgescu

Lecture notes in computer science•Jan 1, 2013•12 citations

Anonymous, Robust Post-quantum Public Key Encryption

Paul Grubbs, Varun Maram, Kenneth G. Paterson

Lecture notes in computer science•Jan 1, 2022•38 citations

A symmetric LWE-based Multi-Recipient Cryptosystem

Saikat Gope, Srinivasan Krishnaswamy, Chayan Bhawal

This article describes a post-quantum multirecipient symmetric cryptosystem whose security is based on the hardness of the LWE problem. In this scheme a single sender encrypts multiple messages for multiple recipients generating a single ciphertext which is broadcast to the recipients. Each recipient decrypts the ciphertext with her secret key to recover the message intended for her. In this process, the recipient cannot efficiently extract any information about the other messages. This scheme is intended for messages like images and sound that can tolerate a small amount of noise. This article introduces the scheme and establishes its security based on the LWE problem. Further, an example is given to demonstrate the application of this scheme for encrypting multiple images.

arXiv:2506.05711•Jun 6, 2025•0 citations

QuantumVault: A Post-Quantum Secured File-Sharing Platform Built on NIST-Standardized Cryptography

Meshari Almoussa, Abdulrahman Al-Hayyah, Abdulrahman Al-Ajlan +2 more

The arrival of cryptographically relevant quantum computers threatens the public-key primitives (RSA, Diffie-Hellman, and elliptic-curve cryptography) that secure essentially all current file-transfer and key-exchange systems, including through harvest-now-decrypt-later attacks. This paper presents QuantumVault, a working web-based file-sharing platform whose entire key-establishment and authentication path is built on the post-quantum algorithms standardized by NIST: ML-KEM (FIPS 203) for key encapsulation and ML-DSA (FIPS 204) for digital signatures, with AES-256-GCM for authenticated bulk encryption and a SHA-256 hash chain for tamper-evident auditing. We describe a hybrid sign-then-encrypt design in which each file is encrypted once under a random data-encryption key that is independently re-wrapped for every recipient using that recipient's post-quantum public key, enabling true multi-recipient sharing and constant-time revocation without re-encrypting file data. We report on the system architecture, the cryptographic workflow, an automated suite of 73 unit and end-to-end tests, an in-application cryptographic self-test, and the security properties the implementation enforces. We also state the system's boundaries candidly: encryption is performed server-side, and we outline a concrete path toward client-side end-to-end encryption as future work.

•May 28, 2026•0 citations
This article describes a post-quantum multirecipient symmetric cryptosystem whose security is based on the hardness of the LWE problem. In this scheme a single sender encrypts multiple messages for multiple recipients generating a single ciphertext which is broadcast to the recipients. Each recipient decrypts the ciphertext with her secret key to recover the message intended for her. In this process, the recipient cannot efficiently extract any information about the other messages. This scheme is intended for messages like images and sound that can tolerate a small amount of noise. This article introduces the scheme and establishes its security based on the LWE problem. Further, an example is given to demonstrate the application of this scheme for encrypting multiple images.
The arrival of cryptographically relevant quantum computers threatens the public-key primitives (RSA, Diffie-Hellman, and elliptic-curve cryptography) that secure essentially all current file-transfer and key-exchange systems, including through harvest-now-decrypt-later attacks. This paper presents QuantumVault, a working web-based file-sharing platform whose entire key-establishment and authentication path is built on the post-quantum algorithms standardized by NIST: ML-KEM (FIPS 203) for key encapsulation and ML-DSA (FIPS 204) for digital signatures, with AES-256-GCM for authenticated bulk encryption and a SHA-256 hash chain for tamper-evident auditing. We describe a hybrid sign-then-encrypt design in which each file is encrypted once under a random data-encryption key that is independently re-wrapped for every recipient using that recipient's post-quantum public key, enabling true multi-recipient sharing and constant-time revocation without re-encrypting file data. We report on the system architecture, the cryptographic workflow, an automated suite of 73 unit and end-to-end tests, an in-application cryptographic self-test, and the security properties the implementation enforces. We also state the system's boundaries candidly: encryption is performed server-side, and we outline a concrete path toward client-side end-to-end encryption as future work.