Chain of Block Headers

Definition ∞ A chain of block headers is a sequential series of data structures, each containing summary information about a specific block in a blockchain. Each header cryptographically references the preceding one, establishing an immutable and verifiable historical record. This structure allows for efficient verification of the entire blockchain’s integrity without downloading full block data. It forms the foundational security mechanism for distributed ledger technology.
Context ∞ The discussion surrounding the chain of block headers often highlights its importance in lightweight client synchronization and proof-of-work verification. A key debate involves optimizing header size and processing for enhanced network efficiency, particularly in resource-constrained environments. Future developments include advancements in cryptographic techniques that might further compress header data while maintaining security assurances.