In a more general sense, "Proof of Possession"

[ninanoo]

I was not accustomed to English, so it was difficult to name, and I am now regretting what I have not set as "Proof of Possession".

If common proprietary information such as a proprietary key is used, it is selected for relevance to the previous block.

However, if the work of PoW shown in the document or the stake of PoS shown in the link below is used, there is no relevance to previous block for consensus at present.

https://ethresear.ch/t/por-proof-of-relevance-a-new-blockchain-consensus-algorithm/2424/3