This project introduces a decryption tool that uses a multi-class SVM classification model to decrypt ciphertexts, encrypted with some randomly generated mixed-ciphertext alphabet. I would like to ...

Abstract: Ciphertext-Policy Attribute-Based Encryption (CP-ABE) allows data to be encrypted under an access policy, which is specified as a logical combination of attributes. However, CP-ABE schemes ...

I have been trying to apply a refresh/bootstrap operation on a ciphertext after a MulRelin operation using CKKS. Decrypting the resulting ciphertext returns completely incorrect values. E.g.

Abstract: In a ciphertext-policy attribute-based encryption (CP-ABE) system, decryption keys are defined over attributes shared by multiple users. Given a decryption key, it may not be always possible ...