SNIP_ADAPTIVE_PLATFORM_SECTION_7_4_1_5_Symmetric_encryption

7.4.1.5 Symmetric encryption Symmetric encryption uses a shared secret (e.g., share key) to encrypt and / or decrypt an information. Without knowing the key, the information cannot be understood by anyone. Symmetric cryptography can be categorized by two algorithm classes: 1. Block Cipher: Data with a fixed length is transformed (en/decrypted). The system can only process complete blocks of data held in its internal memory. 2. Stream Cipher: Information is encrypted as it streams instead of being retained in the system’s memory.