Security research March 18, 2026 · ~5 min read PSpice is a SPICE circuit simulator from Cadence Design Systems that encrypts proprietary semiconductor model files to protect vendor IP and prevent reuse in third-party SPICE simulators. The encryption scheme is proprietary and undocumented. Many third-party component vendors distribute SPICE models exclusively as PSpice-encrypted files, locking them to a single simulator and preventing their use in open-source and alternative tools such as NGSpic...