Definition ∞ Ciphertext-Policy Encryption allows data senders to specify who can decrypt data based on policies within the encrypted text. This cryptographic approach attaches an access policy directly to the ciphertext, meaning the data itself determines who can access it based on their attributes. The encryptor defines the policy, and a user can decrypt the data only if their private key’s attributes satisfy that policy. It stands as a powerful tool for enforcing access control in decentralized and cloud storage environments without requiring prior knowledge of specific recipients.
Context ∞ Ciphertext-Policy Encryption holds significant promise for enhancing data privacy and access control in blockchain and decentralized storage solutions, particularly where sensitive information needs to be selectively disclosed. Its development is critical for enabling compliant and secure data handling in areas such as healthcare records or supply chain data on distributed ledgers. The ongoing discussion involves optimizing its computational efficiency and resistance to collusion attacks to facilitate broader adoption in digital asset management.
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