Definition ∞ A Signature Scheme is a set of cryptographic algorithms used to create and verify digital signatures. These signatures provide authenticity, integrity, and non-repudiation for digital data and transactions. They ensure that data originates from a known sender and has not been altered. Public-key cryptography forms the basis of most signature schemes. This is crucial for digital asset security.
Context ∞ The choice of signature scheme directly impacts the security, efficiency, and privacy features of blockchain transactions. While widely used schemes like ECDSA are effective, ongoing research explores alternatives offering enhanced privacy, such as ring signatures, or quantum resistance. The evolution of signature schemes is vital for adapting blockchain technology to new computational challenges and user demands.
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