Assess students' ability to recall formal definitions and primary security goals of core cryptographic primitives: symmetric encryption (confidentiality, block vs stream, key use), public-key encryption (asymmetric keys, semantic/IND-CPA notions), digital signatures (authenticity, non-repudiation, verification), cryptographic hash functions (preimage, second-preimage and collision resistance), and message authentication codes (integrity and authentication with shared keys). Scope: concise definitions, distinguishing properties, and typical applications; no proofs required.