PALISADE is an open-source cross platform software library that provides implementations of lattice cryptography building blocks and homomorphic encryption schemes.

[2] PALISADE adopted the open modular design principles of the predecessor SIPHER software library from the DARPA PROCEED program.

SIPHER development began in 2010, with a focus on modular open design principles to support rapid application deployment over multiple FHE schemes and hardware accelerator back-ends, including on mobile, FPGA and CPU-based computing systems.

PALISADE began building from earlier SIPHER designs in 2014, with an open-source release in 2017 and substantial improvements every subsequent 6 months.

PALISADE development was funded originally by the DARPA PROCEED and SafeWare programs, with subsequent improvements funded by additional DARPA programs, IARPA, the NSA, NIH, ONR, the United States Navy, the Sloan Foundation and commercial entities such as Duality Technologies.