# Cosmos for a local, ephemeral, permissioned blockchain?
**URL:** https://forum.cosmos.network/t/cosmos-for-a-local-ephemeral-permissioned-blockchain/8670
**Category:** Miscellaneous
**Created:** [December 13, 2022, 2:09pm UTC](https://forum.cosmos.network/t/cosmos-for-a-local-ephemeral-permissioned-blockchain/8670 "2022-12-13T14:09:40Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@orfeas](https://forum.cosmos.network/u/orfeas)
#### Post date: [December 13, 2022, 2:09pm UTC](https://forum.cosmos.network/t/cosmos-for-a-local-ephemeral-permissioned-blockchain/8670/1 "2022-12-13T14:09:40Z")
We need to build a blockchain in an isolated setting (local area network without internet connection) where all participants are known ahead of time and they are largely mutually distrustful. I think that a permissioned blockchain is the best fit for this application. Does Cosmos support such a design? Or the mandatory (IIUC) PoS will prove to be a lot of overhead (both in terms of development & execution)?
Note that in principle one can emulate a permissioned blockchain with PoS by giving 1 untransferrable coin to each party (IIUC).
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### Author:  [@serejandmyself](https://forum.cosmos.network/u/serejandmyself)
#### Post date: [December 13, 2022, 3:45pm UTC](https://forum.cosmos.network/t/cosmos-for-a-local-ephemeral-permissioned-blockchain/8670/2 "2022-12-13T15:45:34Z")
Yes. Tendermint supports this. POA. But what you are referring to is done on testnets.
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### Author:  [@system](https://forum.cosmos.network/u/system)
#### Post date: [December 27, 2022, 3:45pm UTC](https://forum.cosmos.network/t/cosmos-for-a-local-ephemeral-permissioned-blockchain/8670/3 "2022-12-27T15:45:41Z")
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