momalab/e3

Rotation support

Closed this issue · 2 comments

pjattke commented

Hi momalab,

The fact that E3 supports batching is great! We could, however, not find any method to rotate a batched ciphertext. Does there exist a way to rotate a ciphertext in E3? Rotations are essential for batching as data is not always optimally arranged for a batched computation.

Thank you very much!

mazonka commented

At this moment we do not have such function. But we will implement it in the future.

educhielle commented

rotation is now supported with rotate_rows and rotate_columns:

        $Name & rotate_columns();
        $Name & rotate_rows(size_t s);
        static $Name rotate_columns(const $Name & a);
        static $Name rotate_rows(const $Name & a, size_t s);

where $Name is a placeholder for the Secure class name