On the Practicality of PIR - Radu Sion
On the Practicality of PIR - Radu Sion On the Practicality of PIR - Radu Sion
What is a practical PIR protocol ? Stony Brook Network Security and Applied Cryptography Lab Baseline: a cheaper PIR protocol than trivial database transfer (for now !). What is cheaper ? Often, ”not slower”. Faster. Not always ! Practicality of Private Information Retrieval (NDSS, February 2006) 4
Time to “illustrate” … Stony Brook Network Security and Applied Cryptography Lab … we choose: E. Kushilevitz and R. Ostrovsky, “Replication is not needed: single database, computationally-private information retrieval”, FOCS 1997. Why ? It is the least computationally expensive and arguably the fastest of the bunch. The results can be applied to all 7+ single-server computational protocols we looked at (based on wellestablished intractability assumptions) They also apply to any protocol with a per-bit cost > fraction (e.g., 1/10) of the cost of a modular multiplication. Practicality of Private Information Retrieval (NDSS, February 2006) 5
- Page 1 and 2: Network Security and Applied Crypto
- Page 3: What is “practical” ? Stony Bro
- Page 7 and 8: Execution time analysis Stony Brook
- Page 9 and 10: Past: MIPS Schedule Stony Brook Net
- Page 11 and 12: Present: Hardware Stony Brook Netwo
- Page 13 and 14: Present: Low bandwidth conditions S
- Page 15 and 16: Future: CPU Speed follows Moore ! S
- Page 17 and 18: Future: 1 bit multiplication vs. tr
- Page 19 and 20: What do we do ? Stony Brook Network
- Page 21 and 22: IBM 4764 Stony Brook Network Securi
- Page 23 and 24: Comparison: Pentium 4 Stony Brook N
- Page 25 and 26: in/yes > /dev/lunchtime Stony Brook
What is a practical <strong>PIR</strong> protocol ?<br />
Stony Brook Network Security and Applied Cryptography Lab<br />
Baseline: a cheaper <strong>PIR</strong> protocol than<br />
trivial database transfer (for now !).<br />
What is cheaper ?<br />
Often, ”not slower”.<br />
Faster. Not always !<br />
<strong>Practicality</strong> <strong>of</strong> Private Information Retrieval (NDSS, February 2006)<br />
4
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