DASTE: Decentralized Ad-Hoc Access-Structured Threshold Encryption with Dynamic Policy Evolution↗ (원문, 새 창)

본문 미리보기

We introduce DASTE, a decentralized encryption primitive for auditable access control in settings where users independently generate public keys, register them on an immutable ledger, and decrypt only through collaboration. In DASTE, a sender encrypts under an access structure (e.g., an access tree / LSSS) whose leaves are concrete registered public keys selected at encryption time. A ciphertext can therefore be opened only by a qualifying coalition of registered key holders that jointly recon