An analyst wants to let a third-party service run calculations on files that remain locked. Which advanced cryptographic concept is appropriate for preserving confidentiality while allowing direct operations on the data?
Public key cryptography that emphasizes ephemeral key agreement
A technique that enables arithmetic operations directly on encrypted content
A system that relies on aggregated hashing for data processing
A method that applies layered key derivation for categorized data access
A technique that allows arithmetic operations on encrypted data provides the ability to compute sums or products without revealing the original information. Public-key solutions focusing on ephemeral key agreement (first answer) do not preserve data in a locked state during calculation. Layered key derivation (third answer) does not allow direct arithmetic operations on encrypted data. Aggregated hashing (fourth answer) verifies integrity but does not enable calculations on locked information.
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