I was navigating through different projects and a new consensus called "Proof of Honesty" (PoH).
In simple words, in this consensus users select in which nodes their transactions will be validated, rather than PoW and PoS where nodes determine the validity of the transactions.
The idea is that users do not select the "dishonest" nodes as they let only the "honest" validators to validate the transactions, resulting to nearly 100% BFT.
Do you think that this idea may improve the security of blockchains?
There are tons of problems with this approach. First of all, a user has no idea if the validator is indeed honest even if he was honest in the previous block. Second, a malicious entity can create an infinite amount of malicious nodes to create an illusion of the selected validator, to be honest. In the end, this consensus will inevitably lead to having a handful of trusted validators thus making this system controlled by them.
On the side note, your idea reminds me of how EOS (and it's deligated proof of stake) works. This is a step away from the trustless and decentralized system.