DESILO FHE Library v1.4.0 Release Notes

DESILO FHE Library v1.4.0 is now available (released 2025-08-26). Highlights:

• Encoding and decoding can now be done entirely on the GPU. Previously, the calculation was done on the CPU and then moved to the GPU.
• The serialization format has been updated. This update is to prepare for new features in development, so if any data structure is stored, it is recommended to read in the data using the latest version of the library and store them again in the new format. Serialized data structure from older versions of the library can be processed, but the serialized data structure from this version and on cannot be processed by older versions.
• Fixed bug where the engine crashed when trying to rescale a ciphertext or a plaintext in NTT form on the GPU.
• CUDA 12.9 is now supported.
• A sample benchmark of the bootstrap function is now released.

Full release notes: https://fhe.desilo.dev/latest/release_notes/