IT Security techniques - Encryption algorithms - Part 6: Homomorphic encryption

This document specifies the following mechanisms for homomorphic encryption.

- Exponential ElGamal encryption;

- Paillier encryption.

For each mechanism, this document specifies the process for:

- generating parameters and the keys of the involved entities;

- encrypting data;

- decrypting encrypted data; and

- homomorphically operating on encrypted data.

Annex A defines the object identifiers assigned to the mechanisms specified in this document. Annex B provides numerical examples.