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pir

(5 articles)

The Gap Between PIR and Nostr: Open Problems in Private Relay Queries

Can PIR hide Nostr queries from relays? Compound filters and subscriptions don't map to existing schemes. Here are the open problems.

pirprivacycryptographynostrrelaydecentralizationfreedom-techaustrian-economicsfilters

The Trust Shift: Secure Enclaves for Private Nostr Relays

TEE relays shift trust from operators to chip manufacturers. For most threats, that trade is worth making, with eyes open.

austrian-economicsfreedom-techteenostrrelayprivacycryptographypirsecure-enclave

Sifting Through the Archive: Private Set Membership for Blossom

Binary Fuse filters let Blossom clients privately check which files exist on a server - download a compact filter once, query locally with zero server load, and use delta lists for real-time accuracy.

austrian-economicsfreedom-techblossomnostrprivacycryptographypiranonymityfuse-filtersxorprivate-set-reconsolidated

Private Relay Connections: Zero-Knowledge Solutions for Nostr

Nostr relays see everything - who connects, what they fetch, how often they post. Zero-knowledge cryptography can fix all three problems: Semaphore-based authentication hides which whitelisted user is connecting, private information retrieval hides which notes you're fetching, and Privacy Pass enables rate limiting without identity linkage.

austrian-economicsfreedom-technostrrelayprivacyzero-knowledgecryptographypirblind-signaturesprivate-authentication

Computing on Secrets

Services no longer need to see data to compute on it. Cryptographic and hardware primitives make that contract a deployed reality.

austrian-economicsfreedom-techcryptographypirteezero-knowledgeprivacyencryptionprivate-computehomomorphic-encryption