Symmetric-Key Cryptography

Definition ∞ Symmetric-key cryptography is a method of encryption where the same secret key is used for both encrypting and decrypting data. This approach relies on a single shared key between two or more parties to secure communication, offering efficient and fast encryption for large volumes of data. The security of symmetric-key systems depends entirely on keeping the shared key confidential. It is commonly used for data storage encryption and for establishing secure connections after an initial key exchange.
Context ∞ While public-key cryptography is central to blockchain transaction signing, symmetric-key cryptography plays a supporting role in securing data storage and communication within various digital asset infrastructure components. The discussion often concerns its efficient application in securing off-chain data or private communication channels within hybrid systems. A critical future development involves the integration of quantum-resistant symmetric-key algorithms to safeguard digital assets against future computational threats.