Sanitization of FHE Ciphertexts

Explore the concept of sanitization in Fully Homomorphic Encryption (FHE) ciphertexts in this 22-minute conference talk presented by Léo Ducas and Damien Stehlé at Eurocrypt 2016. Delve into the text-book use of FHE, more interesting applications, and circuit privacy. Examine the goals and roadmap for ciphertext sanitization, questioning its necessity and comparing current approaches like noise flooding. Discover an alternative to flooding, including the "washing in a small bucket" concept and the formalized "soak-and-spin" method. Learn about the complete sanitation cycle and its implementation in HELib/FHEW. Gain insights into the main results of this research on FHE ciphertext sanitization techniques.

Intro
The text-book use of FHE
More interesting use of FHE
Circuit privacy
Goal and road-map
Ciphertext sanitization
Do we really need to sanitize ciphertexts?
Current approach: noise flooding Gentry09
An alternative to flooding?
Washing in a a small bucket: what if CouG
Soak-and-spin, formalized
The complete sanitation cycle
Sanitizing in HELib/FHEW
Main result