Multi-Key Searchable Encryption

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Provided by: International Association for Cryptologic Research
Topic: Security
Format: PDF
A promising approach to preventing confidential data disclosures due to adversaries that compromise servers is to store only encrypted data on servers, and to encrypt and decrypt documents only on client machines. In the case of a multi-user application, each user may have access to a different set of documents stored on the server; this can be achieved by ensuring that each document is encrypted with a separate per-document key, and arranging for each user's client machine to have access to the keys of the documents that the corresponding user has access to.
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