What is Linux ID and why is it being developed?

Linux ID is a new system being developed for the Linux kernel to replace the outdated PGP web of trust, aiming to enhance security and better verify developer identities and code integrity.

How does Linux ID differ from the old PGP system?

Linux ID uses decentralized identifiers and cryptographic proofs of personhood, offering a more flexible, privacy-preserving approach compared to the manual and sometimes fragile PGP key-signing process.

Can Linux ID prevent all supply-chain attacks?

While Linux ID aims to significantly raise the cost and complexity for attackers, it is not a guaranteed solution to prevent all supply-chain attacks, but it materially increases the difficulty.

Home / Technology / Linux Kernel Eyes Future Beyond PGP Trust

Linux Kernel Eyes Future Beyond PGP Trust

27 Feb

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Summary

Linux kernel is replacing fragile PGP web of trust.
New system uses decentralized digital IDs and proofs.
Goal is enhanced security against supply-chain attacks.

Linux Kernel Eyes Future Beyond PGP Trust

The Linux kernel community is phasing out its decades-old Pretty Good Privacy (PGP) system for verifying developer identities. Facing risks highlighted by past security breaches, including the kernel.org hack in 2011 and the recent xz utility compromise, maintainers are developing a new system called Linux ID.

This initiative leverages decentralized identifiers (DIDs) and modern digital identity standards to establish cryptographic proofs of personhood. Unlike the manual PGP key-signing process, Linux ID aims for a privacy-preserving, flexible approach where credentials can be anchored by various trusted issuers, including government IDs and employers.

The new system offers a more robust defense against supply-chain attacks by requiring multiple, verifiable credentials instead of a single PGP key. While not a complete solution, it significantly raises the cost and complexity for potential attackers. The technology is still in its early stages, with plans to integrate existing PGP data and test new tools in parallel.

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