Lagrange Interpolation

Definition ∞ Lagrange interpolation is a mathematical method used to find a unique polynomial that passes through a given set of data points. In cryptography, particularly within secret sharing schemes, it enables the reconstruction of a secret from a sufficient number of its distributed shares. This technique is fundamental to the security of systems that rely on threshold cryptography. It ensures that the secret remains hidden unless enough shares are combined.
Context ∞ Lagrange interpolation is a core mathematical primitive underpinning Shamir’s Secret Sharing Scheme and similar cryptographic protocols used in digital asset security. Its reliability is well-established, making it a trusted component for decentralized key management solutions. Research continues into optimizing its computational efficiency and extending its application to more complex cryptographic operations.