US Patent 9531540 Secure token-based signature schemes using look-up tables

Various embodiments relate to a method of generating tokens for use in modular exponentiation and a related device and non-transitory machine readable storage medium, including: generating a public token, τ, based on an identifier associated with another device; generating a private token, L, as a modular exponentiation of the public token, τ, using a private exponent, d, and modulus, N, from a cryptographic key; and communicating the private token, L, to the other device.