# Public Passphrase & Sweepable Multisig **URL:** \ **Category:** Watercooler\ **Created:** [September 22, 2015, 11:04am UTC](https://forums.counterparty.io/t/public-passphrase-sweepable-multisig/1535 "2015-09-22T11:04:54Z")\ **Posts on this page:** 1\ **Showing post:** 25
**Author:** ![ebx](https://yyz2.discourse-cdn.com/flex004/user_avatar/forums.counterparty.io/ebx/32/683_2.png) [@ebx](https://forums.counterparty.io/u/ebx)\ **Post date:** [November 9, 2017, 8:49pm UTC](https://forums.counterparty.io/t/public-passphrase-sweepable-multisig/1535/25 "2017-11-09T20:49:01Z")
> [@joelb88](#): > > i am very careful with my private key, the only details out there is my public key, did i miss anything here?? Sorry, what I meant when I said that it had been used before was that you’ve used it on both blockchain.info and coinb.in (unless I misnderstood). > [@joelb88](#): > > just a question on the bitcin core with addrindex patch, do you mean that i will have to uninstall the latest bitcoin core i have and go back to 0.13.2 and then go from there. or can i get the addrindex patch installed with the latest bitcoin core… Yes, unfortunately that is the case as far as I am aware. Check out the following couple of links and don’t hesitate to read through [https://forums.counterparty.io/c/support/knowledge-base](https://forums.counterparty.io/c/support/knowledge-base) or make a thread in the support section if you need help setting that up. > [@What is addrindex and why is it necessary?](https://forums.counterparty.io/t/what-is-addrindex-and-why-is-it-necessary/1202): > > It’s an optional start-up argument to Bitcoin executable (and/or configuration file) which adds another index of the blockchain to one’s Bitcoin setup. Prior to Nov 9, 2014 txindex was the only blockchain index that Counterparty used. After that, in order to support multisig without relying on Web APIs (which were sometimes unreliable), an addrindex became necessary. To recap: txindex is an index of all transactions on the blockchain addrindex is an index of all addresses on the blockchain T… > --- _[View the full topic](https://forums.counterparty.io/t/public-passphrase-sweepable-multisig/1535)._