Zero Knowledge Proofs

Stealth Software and UVM Researchers Build ZK-JPEG to Verify Compressed Photo Authenticity

Researchers from Stealth Software Technologies and the University of Vermont have developed ZK-JPEG, a zero-knowledge cryptographic system that proves a JPEG image was correctly compressed from a genuine, committed source photo. The tool also supports common edits like blurring or redacting regions while still generating a valid proof, using the PicoZK framework to translate Python-based image editing into a zero-knowledge circuit built on line-point zero knowledge proofs.

eprint.iacr.org · 2026-09-19

Signal to adopt zero-knowledge proofs for phone-number-free registration

Signal is moving toward letting users register accounts without providing a phone number, using zero-knowledge proof cryptography to verify accounts without exposing identifying data. The technology mirrors methods Signal already uses for donation badges and group membership, where proofs confirm status without revealing which specific badge or group is involved.

community.signalusers.org · 2026-09-13