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@paragonie-scott
paragonie-scott / jose-security.md
Last active June 12, 2020 11:32
Suggestions for a Secure JOSE Alternative (or Protocol Upgrade)

Changes to JOSE that will prevent insecurity

Deletions

JWS and JWE

Drop the alg header

Neither JOSE users nor JOSE library designers should be required to understand cryptography primitives. At a lower level, this can lead to badly implemented primitives. On a higher level, this can lead to reasoning by lego.

@joepie91
joepie91 / blockchain.md
Last active June 25, 2023 08:40
Is my blockchain a blockchain?

Your blockchain must have all of the following properties:

  • It's a merkle tree, or a construct with equivalent properties.
  • There is no single point of trust or authority; nodes are operated by different parties.
  • Multiple 'forks' of the blockchain may exist - that is, nodes may disagree on what the full sequence of blocks looks like.
  • In the case of such a fork, there must exist a deterministic consensus algorithm of some sort to decide what the "real" blockchain looks like (ie. which fork is "correct").
  • The consensus algorithm must be executable with only the information contained in the blockchain (or its forks), and no external input (eg. no decisionmaking from a centralized 'trust node').

If your blockchain is missing any of the above properties, it is not a blockchain, it is just a ledger.