Definition
A session key in blockchain systems is a cryptographic key, distinct from a long‑term account key, that is authorized to perform a constrained set of actions for a limited duration or under predefined conditions. It functions as a temporary authorization component within an account or smart contract architecture, enabling controlled signing or execution rights without exposing the primary controlling key material.
In Simple Terms
A session key is a temporary cryptographic key that gets limited, pre‑defined permissions to act on behalf of an account or contract for a short period. It lets the main, more powerful key stay protected while still allowing certain actions to be authorized during an active session.
Context and Usage
Session keys are discussed in the context of advanced wallet designs, account abstraction architectures, and permissioned smart contract interactions. They appear in security models, protocol specifications, and security audit scopes where granular authorization and key separation are important. The term is also used when describing intent-based transaction flows and modular wallet systems that distinguish between primary control keys and short‑lived operational keys.