Symmetric key primitives are fundamental cryptographic algorithms that use the same secret key for both encryption and decryption operations. These primitives form the building blocks for secure communication and data storage, offering high speed and efficiency. Examples include block ciphers and stream ciphers. They are essential components in constructing secure digital systems.
Context
The current focus is on developing and standardizing new symmetric key primitives that offer enhanced security against advanced cryptanalytic techniques, including those posed by quantum computing. A key debate involves balancing the computational performance of these primitives with their resistance to various attack vectors. Future developments will include lightweight symmetric ciphers for IoT devices and robust algorithms suitable for high-throughput blockchain applications.
A new cryptographic primitive, resumable ZKPoK, enables sequential proof sessions to be exponentially cheaper, unlocking efficient stateful post-quantum cryptography.
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