The advent of practical quantum computing will break all commonly used public key cryptographic algorithms. In response, NIST is researching cryptographic algorithms for public key-based key agreement and digital signatures that are not susceptible to cryptanalysis by quantum algorithms. NIST is holding this workshop to engage academic, industry, and government stakeholders. The Post Quantum Workshop will be held on April 2-3, 2015, immediately following the 2015 International Conference on Practice and Theory of Public-Key Cryptography. NIST seeks to discuss issues related to post-quantum cryptography and its potential future standardization.