Cluster analysis over encrypted data by using HEaaN.
Implementation of [CKP;SAC'19] (Jung Hee Cheon, Duhyeong Kim, Jai Hyun Park, "Towards a Practical Cluster Analysis over Encrypted Data", Selected Areas in Cryptography, 2019, doi:10.1007/978-3-030-38471-5_10, http://eprint.iacr.org/2019/465)