Definition ∞ Cryptosystem bootstrapping is a technique used in fully homomorphic encryption (FHE) to refresh encrypted data, allowing an unlimited number of computations to be performed directly on ciphertext without decrypting it. This process effectively reduces the noise that accumulates during homomorphic operations, preventing it from overwhelming the encrypted data. It enables complex privacy-preserving computations on sensitive information. This process extends the lifespan of encrypted data for computation.
Context ∞ The concept of cryptosystem bootstrapping is a critical advancement for practical fully homomorphic encryption, which holds significant promise for privacy-preserving computation in cloud environments and blockchain applications. Challenges include the high computational cost and performance overhead associated with the bootstrapping process. Ongoing research seeks to optimize bootstrapping techniques to make FHE more efficient and widely applicable. Its successful implementation could revolutionize data privacy.
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