Form of encryption that allows computation on ciphertexts
Homomorphic encryption
General
Derived from
Various assumptions, including learning with errors, Ring learning with errors or even RSA (multiplicative) and others
Related to
Functional encryption
Homomorphic encryption is a form of encryption that allows computations to be performed on encrypted data without first having to decrypt it. The resulting computations are left in an encrypted form which, when decrypted, result in an output that is identical to that produced had the operations been performed on the unencrypted data. Homomorphic encryption can be used for privacy-preserving outsourced storage and computation. This allows data to be encrypted and out-sourced to commercial cloud environments for processing, all while encrypted.
Homomorphic encryption eliminates the need for processing data in the clear, thereby preventing attacks that would enable a hacker to access that data while it is being processed, using privilege escalation.[1]
For sensitive data, such as health care information, homomorphic encryption can be used to enable new services by removing privacy barriers inhibiting data sharing or increasing security to existing services. For example, predictive analytics in health care can be hard to apply via a third party service provider due to medical data privacy concerns, but if the predictive analytics service provider can operate on encrypted data instead, these privacy concerns are diminished. Moreover, even if the service provider's system is compromised, the data would remain secure.[2]
^Sellers, Andrew. "Council Post: Everything You Wanted To Know About Homomorphic Encryption (But Were Afraid To Ask)". Forbes. Retrieved 2023-08-18.
^Munjal, Kundan; Bhatia, Rekha (2022). "A systematic review of homomorphic encryption and its contributions in healthcare industry". Complex & Intelligent Systems. 9 (4): 3759–3786. doi:10.1007/s40747-022-00756-z. PMC 9062639. PMID 35531323.
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