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Cuda acceleration of TFHE’s programmable bootstrapĬuda acceleration is now available in Concrete-core. Now let’s dive into more details of the new Cuda backend introduced in this release. This new structure is represented in the figure below: Additionally, a new Cuda backend is introduced that provides GPU acceleration for the bootstrap and keyswitch. An FFTW backend that implements operations involving polynomial multiplication (bootstrap, Cmux, external product) with FFTW acceleration. This choice is made at compile time, so it is possible to build the default backend for a chosen target.

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Otherwise, a unix seeder can be used in place of ` rdseed` and CSPRNG software in place of ` aesni`. Encryption can be performed using ` rdseed` and/or ` aesni` on x86_64 platforms that support it.The bootstrap key creation can be accelerated with multithreading, relying on the ` rayon` dependency.It should have an FFT support relying on RustFFT in the future. It supports a variety of leveled operations on ciphertexts, but nothing involving the FFT (e.g.It is the main backend for encryption, decryption, and key creation.A default backend that does not depend on specialized hardware, unless specific compile-time configuration is performed: The former ` Core` backend is now split into:

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This infrastructure was introduced with the V1.0.0-beta release in April 2022, which set us free to proceed with the main restructuring of Concrete-core: multi-backend support.

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Adapting Concrete-core V0.1.10 required an extensive restructuring of the code base in order to see it through safely, we needed a testing infrastructure.

Enabling multi-platform supportįrom the start, the V1 design has been aimed at supporting a wide variety of platforms and hardware. In the sections below, more details are given on the new multi-platform support and the Cuda acceleration introduced in this release. The aim is to enable the widest possible range of applications to be built on top of Concrete-core.

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We plan to make their generation automatic and to offer full coverage of Concrete-core’s features. The C API covers the use case of the Concrete Framework’s Compiler, while the WASM API provides all necessary engines for a client application. Both only wrap a subset of Concrete-core at the moment. This release comes with two new APIs on top of Concrete-core: a C API and a WASM API. Serialization engines are also implemented.

Support for serialization: entities now have a serialization version attached to them, so that it’s possible to know which version of Concrete-core generated them.

A split of the Core backend in order to enable multi-platform support.

A new Cuda backend, dedicated to the acceleration of the programmable bootstrap and the keyswitch on Nvidia GPUs (Nvidia GPUs are widely available on compute environments and highly popular in machine learning, which is why we are targeting this brand specifically).

Today, it is our pleasure to deliver Concrete-core V1.0.0-gamma, with Cuda acceleration! Visit the Github release note for the full list of changes. Check out previous blog posts on the topic ( V1.0.0-alpha and V1.0.0-beta), where we explain how Concrete-core is designed to experiment and integrate new FHE-related hardware-acceleration with ease! This release is the third major step toward the 1.0.0 release of Zama’s low-level crypto library, Concrete-core.