# FHE-FFT > WIP Materials > [TACEO's MHEGA blog](https://blog.taceo.io/mhega/) [1] > [Blind zk-SNARKs paper 2024](https://eprint.iacr.org/2024/1684) [2] > [Diagonal Method in 4.2](https://eprint.iacr.org/2014/106.pdf) [3] ## Method 1 ("No-FFT" + No Bootstrapping FHE + Diagonal Method) Just do DFT in the FHE way ## Method 2 ("Split-FFT" with depth-2 FHE)