Lattice-based puncturable attribute-based proxy re-encryption scheme in cloud computing

doi:10.1016/j.jisa.2025.104325

Lattice-based puncturable attribute-based proxy re-encryption scheme in cloud computing

2025-12-05

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DOI：10.1016/j.jisa.2025.104325

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Governmental and military organizations frequently manage sensitive documents that require both secure distribution and long-term preservation. These documents are typically encrypted and disseminated across multiple departments or agencies under access policies. To ensure confidentiality and accountability, attribute-based proxy re-encryption (ABPRE) allows flexible one-to-many data sharing. However, once receivers’ keys are exposed, unauthorized decryption of historical ciphertexts becomes possible, creating severe risks to national security and organizational integrity. The central challenge lies in reconciling document archiving with effective protection against post-compromise leakage. To tackle this issue, we present a lattice-based puncturable key-policy attribute-based proxy re-encryption (P-KP-ABPRE) scheme. In our design, recipients may autonomously revoke decryption capability for specific tags, thereby revoking access to selected ciphertexts without requiring data owner involvement or global re-encryption. This recipient-driven revocation mechanism not only achieves forward security but also reduces system overhead while preserving the reusability of ciphertexts. Built upon the learning with errors (LWE) assumption, our scheme supports multi-bit encryption, and demonstrates security against quantum attacks and chosen-plaintext attacks (CPA).

Lattice-based puncturable attribute-based proxy re-encryption scheme in cloud computing

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