zkDaily - 2026-06-08

零知识证明 zkDaily

ZKP Frontier Tracker 🎯

Mon

06.08

2026

Private Information Retrieval: A Tutorial and Survey

Paper

https://eprint.iacr.org/2026/1135

Pranav Shriram Arunachalaramanan PIR

Arunachalaramanan et al. present a tutorial and survey on private information retrieval (PIR) in their paper, covering various PIR schemes, their extensions, efficiency comparisons, and guidance for practical deployment.

Notes

PIR enables private database retrieval without revealing which entry is accessed.
Covers IT-secure, computational, single-/multi-server, and preprocessing models.
Extensions for keyword and batch queries are introduced.
Efficiency comparisons and selection guidance provided for different paradigms.
Discusses practical applications of PIR.
Serves as an introduction for readers new to the field and a springboard for advanced topics.

Collected by @icerdesign

零知识证明 zkDaily

Q&A Deep Dive 💬

Mon

06.08

2026

What is Private Information Retrieval (PIR)?

PIR is a privacy-preserving technique that allows a user to retrieve data from a database without revealing which record is being queried.

What is keyword-query PIR?

Traditional PIR retrieves data by index, while keyword-query PIR allows users to search by keywords without revealing the queried keyword.

How is PIR related to zero-knowledge proofs?

PIR focuses on hiding user queries, while zero-knowledge proofs verify computation correctness. Modern privacy systems often combine PIR with zkSNARKs to achieve both private and verifiable data access.

Prompted by @icerdesign