README.md
In openfhe.R: R Interface to the 'OpenFHE' Fully Homomorphic Encryption Library

Encodings

This folder contains the header files of the various encoding formats. Broadly speaking, an encoding is the intermediate transformation between a plaintext and a ciphertext.

flowchart BT
    A[Input Plaintext] --> |"1) Encode"| B(Encoded Plaintext);
    B(Encoded Plaintext) --> |"2) Encrypt"| C(Ciphertext);
    C(Ciphertext) --> |"3) Decrypt"| B(Encoded Plaintext);
    B(Encoded Plaintext) --> |"4) SetLength"| D(Homomorphically Transformed Plaintext);

We provide a brief overview of the files below. However, we recommend referring to our ReadTheDocs - PKE/Encoding Headers for more in-depth information.

CKKS Packed Encoding - Describes the CKKS packing. Accepts a std::vector<double> unlike the other schemes.

Coef Packed Encoding - Accepts plaintext data and packs the data into coefficients of a polynomial. - Note: is rarely used - Note: only supports element-wise addition, so ensure that you need this before using

Encoding Params - The object containing the parameters for encoding. These parameters are kept and continually reused (can be modified) during the encoding of new values

Encodings - "import" file which can be used for a single #include

Packed Encoding - Packs integers into a vector - Note: is almost always what you want to use (other than if you want to deal with floating numbers)

Plaintext - The base plaintext implementation

Plaintext Factory - Factory class that instantiates plaintexts

String Encoding - Encodes strings