SuperScalar: Laddered Timeout-Tree-Structured Decker-Wattenhofer Factories

The discussion revolves around the proposition of removing shachain entirely from a system to simplify the storage of revocation keys. The core issue identified is the lack of an efficient multi-participant method for creating shachain, which is crucial for systems where a channel endpoint may involve multiple signers. The current setup does not support the creation of a single shachain for an endpoint with multiple signers without revealing the multiplicity of signers, which is essential for maintaining the integrity of a multisignature setup. In multisignature configurations, the security model relies on requiring multiple devices to be compromised before financial loss can occur. Therefore, if a single device could perform the shachain generation independently, it would undermine the foundational security principle of multisignature mechanisms by not adhering to the requirement that multiple devices be compromised to result in financial loss. This critique highlights a significant limitation in the existing approach to shachain within the context of enhancing security for transactions involving multiple signers.