Definition ∞ Signature expansion refers to an increase in the data size required to represent a cryptographic signature within a transaction. This phenomenon can occur with certain advanced cryptographic schemes or when multiple signatures are aggregated. While enhancing security or functionality, expanded signatures consume more block space, potentially increasing transaction fees and network congestion. Managing signature size is a balance between cryptographic strength and blockchain scalability.
Context ∞ Signature expansion is a technical consideration often discussed in crypto news when evaluating blockchain scalability and transaction efficiency. Developments in signature aggregation techniques, such as BLS signatures, aim to mitigate this expansion by allowing multiple signatures to be condensed into a single, smaller proof. This area of research is critical for optimizing block space usage and reducing transaction costs on high-throughput networks. The impact of signature size directly affects the economic viability of certain blockchain applications.
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