Sharing Notice: White The National Cryptographic Standards Table of Contents: Traffic Light Protocol (TLP) 4 Updates to Document 5 Executive Summary 8 1 Introduction 9 1.1 Scope 9 1.2 Levels of Cryptographic Standards 9 1.3 Structure of the Document 10 2 Cryptographic Primitives 2.1 11 Symmetric Algorithms 11 2.1.1 Stream Cipher Algorithms 11 2.1.2 Block Ciphers Algorithms 11 2.2 Asymmetric Algorithms 12 2.3 Hash Functions 12 2.4 Lightweight Crypto Algorithms 12 3 Cryptographic Schemes 14 3.1 Block Cipher Modes of Operation 14 3.2 Message Authentication Codes (MAC) 14 3.3 Authenticated Encryption with Associated Data (AEAD) 14 3.4 Key Wrap Functions 14 3.5 Key Derivation Functions (KDF) 15 3.6 Key Agreement and Key Transport 15 3.6.1 Symmetric Schemes 15 3.6.2 Asymmetric Schemes: Key Exchange Algorithms 15 3.7 Hybrid Encryption Schemes 16 3.8 Public Key Signatures 16 6 Document Classification: Open

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