BIPs bitcoin improvement proposals

126 - Best Practices for Heterogeneous Input Script Transactions

<pre> BIP: 126 Title: Best Practices for Heterogeneous Input Script Transactions Author: Kristov Atlas <kristov@openbitcoinprivacyproject.org> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0126 Status: Draft Type: Informational Created: 2016-02-10 License: PD </pre> ==Abstract== When a Bitcoin transaction contains inputs that reference previous transaction outputs sent to different Bitcoin addresses, personally identifiable information of the user will leak into the blockchain in an uncontrolled manner. While undesirable, these transactions are frequently unavoidable due to the natural fragmentation of wallet balances over time. This document proposes a set of best practice guidelines which minimize the uncontrolled disclosure of personally identifiable information by defining standard forms for transactions containing heterogenous input scripts. ==Copyright== This BIP is in the public domain. ==Definitions== ...

69 - Lexicographical Indexing of Transaction Inputs and Outputs

<pre> BIP: 69 Layer: Applications Title: Lexicographical Indexing of Transaction Inputs and Outputs Author: Kristov Atlas <kristov@openbitcoinprivacyproject.org> Editor: Daniel Cousens <bips@dcousens.com> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0069 Status: Proposed Type: Informational Created: 2015-06-12 License: PD </pre> ==Abstract== Currently there is no standard for bitcoin wallet clients when ordering transaction inputs and outputs. As a result, wallet clients often have a discernible blockchain fingerprint, and can leak private information about their users. By contrast, a standard for non-deterministic sorting could be difficult to audit. This document proposes deterministic lexicographical sorting, using hashes of previous transactions and output indices to sort transaction inputs, as well as values and scriptPubKeys to sort transaction outputs. ==Copyright== This BIP is in the public domain. ...

123 - BIP Classification

<pre> BIP: 123 Title: BIP Classification Author: Eric Lombrozo <elombrozo@gmail.com> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0123 Status: Active Type: Process Created: 2015-08-26 License: CC0-1.0 GNU-All-Permissive </pre> ==Abstract== This document describes a classification scheme for BIPs. BIPs are classified by system layers with lower numbered layers involving more intricate interoperability requirements. The specification defines the layers and sets forth specific criteria for deciding to which layer a particular standards BIP belongs. ==Copyright== This BIP is dual-licensed under the Creative Commons CC0 1.0 Universal and GNU All-Permissive licenses. ==Motivation== Bitcoin is a system involving a number of different standards. Some standards are absolute requirements for interoperability while others can be considered optional, giving implementors a choice of whether to support them. ...