A safe way to remove objectionable content from the blockchain

The discussion delves into the nuanced aspects of Zero-Knowledge Proofs (ZKPs) and their application within the realm of blockchain technology, focusing on the prevention of arbitrary data publication. A significant point raised is the inherent property of ZKPs that unintentionally permits data embedding due to their non-deterministic nature, illustrated by comparing Schnorr and BLS signatures. Specifically, the deterministic quality of BLS, characterized by the absence of a nonce, eliminates a potential channel for data embedding, contrasting with Schnorr signatures which possess this channel owing to their Zero-Knowledge properties.

Further exploration into the topic reveals skepticism towards the feasibility of mitigating exploits derived from ZKPs in decentralized blockchains. This skepticism parallels concerns regarding merge mining, suggesting that what seems like beneficial innovations may eventually succumb to unforeseen vulnerabilities. Despite these challenges, there's an acknowledgment of the complexity and the evolving understanding of these technologies.

OpenTimestamps (OTS) is discussed as an example of utilizing cryptographic proofs for data integrity without necessitating proof of publication. OTS functions by demonstrating that any alteration to a piece of data (A) mandates a corresponding change in another (B), thereby ensuring tamper protection and affirming the existence of data at a certain point in time. This mechanism differs fundamentally from the concept of proving historical publication or conditional event-based publication, underscoring the variety of applications for cryptographic proofs beyond traditional use cases.

The email also touches upon the differentiation between proofs of past publication and conditional future publication events, highlighting the specific functionalities and implementations of OTS and Hashed Timelock Contracts (HTLCs). This distinction emphasizes the broader applicability and potential of cryptographic techniques in securing data and facilitating trustless interactions within digital ecosystems.

For further reading on the intricacies of these cryptographic mechanisms and their applications, Peter Todd's insights can be explored at Peter Todd's website.