Alin Tomescu on Distributed On-chain Randomness and Keyless Accounts
Zero Knowledge
Verifiable Random Function and Unpredictability in Signature Schemes
Unpredictability in a Verifiable Unforgeable Function (VUF) is analogous to unforgeability in a signature scheme. Both imply that without a previous reference, it is impossible to reproduce the output for a new input. Cryptographers often interchange these terms. Additionally, to ensure true randomness and prevent predictability in the output, applying a random oracle to the function's output is necessary, leading to the creation of a Verifiable Random Function.
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