mirror of
https://github.com/monero-project/monero-docs.git
synced 2025-01-26 20:46:22 +00:00
15 lines
No EOL
18 KiB
HTML
15 lines
No EOL
18 KiB
HTML
<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><meta name=description content="Unofficial Monero Documentation"><meta name=author content="Piotr 'Qertoip' Włodarek"><link href=https://monerodocs.org/todo/confidential-transactions/ rel=canonical><link rel="shortcut icon" href=../../assets/favicon.png><meta name=generator content="mkdocs-1.1.2, mkdocs-material-6.2.5"><title>Confidential transactions - Monero Documentation</title><link rel=stylesheet href=../../assets/stylesheets/main.15aa0b43.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.75751829.min.css><meta name=theme-color content=#ffffff><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link rel=stylesheet href="https://fonts.googleapis.com/css?family=Roboto:300,400,400i,700%7CRoboto+Mono&display=fallback"><style>body,input{font-family:"Roboto",-apple-system,BlinkMacSystemFont,Helvetica,Arial,sans-serif}code,kbd,pre{font-family:"Roboto Mono",SFMono-Regular,Consolas,Menlo,monospace}</style><link rel=stylesheet href=../../overrides.css></head> <body dir=ltr data-md-color-scheme data-md-color-primary=white data-md-color-accent=indigo> <input class=md-toggle data-md-toggle=drawer type=checkbox id=__drawer autocomplete=off> <input class=md-toggle data-md-toggle=search type=checkbox id=__search autocomplete=off> <label class=md-overlay for=__drawer></label> <div data-md-component=skip> </div> <div data-md-component=announce> </div> <header class=md-header data-md-component=header> <nav class="md-header-nav md-grid" aria-label=Header> <a href=https://monerodocs.org title="Monero Documentation" class="md-header-nav__button md-logo" aria-label="Monero Documentation"> <img src=../../images/monero.svg alt=logo> </a> <label class="md-header-nav__button md-icon" for=__drawer> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2z"/></svg> </label> <div class=md-header-nav__title data-md-component=header-title> <div class=md-header-nav__ellipsis> <div class=md-header-nav__topic> <span class=md-ellipsis> Monero Documentation </span> </div> <div class=md-header-nav__topic> <span class=md-ellipsis> Confidential transactions </span> </div> </div> </div> <label class="md-header-nav__button md-icon" for=__search> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0116 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 019.5 16 6.5 6.5 0 013 9.5 6.5 6.5 0 019.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5z"/></svg> </label> <div class=md-search data-md-component=search role=dialog> <label class=md-search__overlay for=__search></label> <div class=md-search__inner role=search> <form class=md-search__form name=search> <input type=text class=md-search__input name=query aria-label=Search placeholder=Search autocapitalize=off autocorrect=off autocomplete=off spellcheck=false data-md-component=search-query data-md-state=active required> <label class="md-search__icon md-icon" for=__search> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0116 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 019.5 16 6.5 6.5 0 013 9.5 6.5 6.5 0 019.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5z"/></svg> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg> </label> <button type=reset class="md-search__icon md-icon" aria-label=Clear data-md-component=search-reset tabindex=-1> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41z"/></svg> </button> </form> <div class=md-search__output> <div class=md-search__scrollwrap data-md-scrollfix> <div class=md-search-result data-md-component=search-result> <div class=md-search-result__meta> Initializing search </div> <ol class=md-search-result__list></ol> </div> </div> </div> </div> </div> <div class=md-header-nav__source> <a href=https://github.com/monerodocs/md/ title="Go to repository" class=md-source> <div class="md-source__icon md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><path d="M439.55 236.05L244 40.45a28.87 28.87 0 00-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 01-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 000 40.81l195.61 195.6a28.86 28.86 0 0040.8 0l194.69-194.69a28.86 28.86 0 000-40.81z"/></svg> </div> <div class=md-source__repository> monerodocs/md </div> </a> </div> </nav> </header> <div class=md-container data-md-component=container> <main class=md-main data-md-component=main> <div class="md-main__inner md-grid"> <div class="md-sidebar md-sidebar--primary" data-md-component=navigation> <div class=md-sidebar__scrollwrap> <div class=md-sidebar__inner> <nav class="md-nav md-nav--primary" aria-label=Navigation data-md-level=0> <label class=md-nav__title for=__drawer> <a href=https://monerodocs.org title="Monero Documentation" class="md-nav__button md-logo" aria-label="Monero Documentation"> <img src=../../images/monero.svg alt=logo> </a> Monero Documentation </label> <div class=md-nav__source> <a href=https://github.com/monerodocs/md/ title="Go to repository" class=md-source> <div class="md-source__icon md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 448 512"><path d="M439.55 236.05L244 40.45a28.87 28.87 0 00-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 01-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 000 40.81l195.61 195.6a28.86 28.86 0 0040.8 0l194.69-194.69a28.86 28.86 0 000-40.81z"/></svg> </div> <div class=md-source__repository> monerodocs/md </div> </a> </div> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../.. class=md-nav__link> Home </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-2 type=checkbox id=nav-2> <label class=md-nav__link for=nav-2> Interacting <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label=Interacting data-md-level=1> <label class=md-nav__title for=nav-2> <span class="md-nav__icon md-icon"></span> Interacting </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../interacting/download-monero-binaries/ class=md-nav__link> Download </a> </li> <li class=md-nav__item> <a href=../../interacting/verify-monero-binaries/ class=md-nav__link> Verify </a> </li> <li class=md-nav__item> <a href=../../interacting/overview/ class=md-nav__link> Overview </a> </li> <li class=md-nav__item> <a href=../../interacting/monero-config-file/ class=md-nav__link> Config file </a> </li> <li class=md-nav__item> <a href=../../interacting/monerod-reference/ class=md-nav__link> monerod </a> </li> <li class=md-nav__item> <a href=../../interacting/monero-wallet-cli-reference/ class=md-nav__link> monero-wallet-cli </a> </li> <li class=md-nav__item> <a href=../../interacting/monero-wallet-gui-reference/ class=md-nav__link> monero-wallet-gui </a> </li> <li class=md-nav__item> <a href=../../interacting/monero-wallet-rpc-reference/ class=md-nav__link> monero-wallet-rpc </a> </li> <li class=md-nav__item> <a href=../../interacting/monero-blockchain-export-reference/ class=md-nav__link> monero-blockchain-export </a> </li> <li class=md-nav__item> <a href=../../interacting/monero-blockchain-import-reference/ class=md-nav__link> monero-blockchain-import </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../technical-specs/ class=md-nav__link> Technical specs </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-4 type=checkbox id=nav-4> <label class=md-nav__link for=nav-4> Cryptography <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label=Cryptography data-md-level=1> <label class=md-nav__title for=nav-4> <span class="md-nav__icon md-icon"></span> Cryptography </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../cryptography/introduction/ class=md-nav__link> Introduction </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-4-2 type=checkbox id=nav-4-2> <label class=md-nav__link for=nav-4-2> Asymmetric <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label=Asymmetric data-md-level=2> <label class=md-nav__title for=nav-4-2> <span class="md-nav__icon md-icon"></span> Asymmetric </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../cryptography/asymmetric/introduction/ class=md-nav__link> Introduction </a> </li> <li class=md-nav__item> <a href=../../cryptography/asymmetric/private-key/ class=md-nav__link> Private keys </a> </li> <li class=md-nav__item> <a href=../../cryptography/asymmetric/public-key/ class=md-nav__link> Public keys </a> </li> <li class=md-nav__item> <a href=../../cryptography/asymmetric/edwards25519/ class=md-nav__link> Edwards25519 curve </a> </li> <li class=md-nav__item> <a href=../../cryptography/asymmetric/key-image/ class=md-nav__link> Key image </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../cryptography/base58/ class=md-nav__link> Base58 </a> </li> <li class=md-nav__item> <a href=../../cryptography/prng/ class=md-nav__link> PRNG </a> </li> <li class=md-nav__item> <a href=../../cryptography/keccak-256/ class=md-nav__link> Keccak-256 </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-5 type=checkbox id=nav-5> <label class=md-nav__link for=nav-5> Address <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label=Address data-md-level=1> <label class=md-nav__title for=nav-5> <span class="md-nav__icon md-icon"></span> Address </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../public-address/standard-address/ class=md-nav__link> Standard </a> </li> <li class=md-nav__item> <a href=../../public-address/subaddress/ class=md-nav__link> Subaddress </a> </li> <li class=md-nav__item> <a href=../../public-address/integrated-address/ class=md-nav__link> Integrated </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-6 type=checkbox id=nav-6> <label class=md-nav__link for=nav-6> Proof of Work <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label="Proof of Work" data-md-level=1> <label class=md-nav__title for=nav-6> <span class="md-nav__icon md-icon"></span> Proof of Work </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../proof-of-work/what-is-pow/ class=md-nav__link> What is PoW? </a> </li> <li class=md-nav__item> <a href=../../proof-of-work/pow-in-cryptocurrencies/ class=md-nav__link> PoW in Cryptocurrencies </a> </li> <li class=md-nav__item> <a href=../../proof-of-work/cryptonight/ class=md-nav__link> CryptoNight </a> </li> <li class=md-nav__item> <a href=../../proof-of-work/random-x/ class=md-nav__link> RandomX </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../multisignature/ class=md-nav__link> Multisignature </a> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-8 type=checkbox id=nav-8> <label class=md-nav__link for=nav-8> Infrastructure <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label=Infrastructure data-md-level=1> <label class=md-nav__title for=nav-8> <span class="md-nav__icon md-icon"></span> Infrastructure </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../infrastructure/networks/ class=md-nav__link> Mainnet, stagenet, testnet </a> </li> <li class=md-nav__item> <a href=../../infrastructure/tor-onion-p2p-seed-nodes/ class=md-nav__link> Tor onion seed nodes </a> </li> <li class=md-nav__item> <a href=../../infrastructure/monero-pulse/ class=md-nav__link> MoneroPulse </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-9 type=checkbox id=nav-9> <label class=md-nav__link for=nav-9> Running a Node <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label="Running a Node" data-md-level=1> <label class=md-nav__title for=nav-9> <span class="md-nav__icon md-icon"></span> Running a Node </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../running-node/open-node-tor-onion/ class=md-nav__link> Open Node + Tor Onion </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle" data-md-toggle=nav-10 type=checkbox id=nav-10> <label class=md-nav__link for=nav-10> Accepting Monero <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav aria-label="Accepting Monero" data-md-level=1> <label class=md-nav__title for=nav-10> <span class="md-nav__icon md-icon"></span> Accepting Monero </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../accepting-monero/overview/ class=md-nav__link> Overview </a> </li> </ul> </nav> </li> </ul> </nav> </div> </div> </div> <div class=md-content> <article class="md-content__inner md-typeset"> <a href=https://github.com/monerodocs/md/edit/master/docs/todo/confidential-transactions.md title="Edit this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z"/></svg> </a> <h1>Confidential transactions</h1> <p>Pieter Wuille on CT:</p> <p>In a system that uses CT, if someone finds a break in the fundamental security of elliptic curve cryptography (ECC), he can print money. Worse, because the amounts are all private, he can do so undetectably. That's an existential threat for a currency which has controlled inflation as prime goal.</p> <p>Such a break would be dangerous for Bitcoin (even without CT) regardless, as it relies on ECC for protecting against theft. However, Bitcoin can migrate to use a different signature scheme if necessary. It would be chaotic, but not necessarily pose an existential risk.</p> <p>There are people who agree with this perspective. It's a mathematical fact that any privacy system that hides amounts and is built on top of ECC will at least have one of the properties below:</p> <div class=highlight><pre><span></span><code>An ECC break will permit printing money undetectaby.
|
|
|
|
An ECC break will permit deanonymizing amounts in the historical chain.
|
|
</code></pre></div> <p>In other words:</p> <div class=highlight><pre><span></span><code>An ECC break means the currency can undetectably be inflated (going forward).
|
|
|
|
An ECC break means the ledger's history can retroactively be deanonymized (goin backward).
|
|
</code></pre></div> <p>So we are faced with a choice between those two regardless if we want better privacy. Some people believe the second is worse than the first, and choosing the first actually allows for more efficient technology. This is a choice that Zcash, Monero, Grin, all make. CT with Bulletproofs would do the same.</p> <p>However, regardless of your own opinion in this matter, Bitcoin's evolution is a large collaborative process, where such fundamental changes need buy-in from large parts of the ecosystem. My fear is that the question of giving up the ability to exactly audit the monetary supply is going to make it hard to make CT acceptable.</p> <p>Furthermore, there are other challenges. CT makes transactions larger, slower to verify, and poses a very significant engineering challenge to incorporate into Bitcoin without breaking backward compatibility.</p> <p>++++</p> <blockquote> <p>Also, is there any possible system that can have unconditional soundness and privacy at the same time (something other than ECC obviously)?</p> </blockquote> <p>No, that's mathematically impossible.</p> </article> </div> </div> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-footer-copyright style="margin: auto;"> <a href=http://bumz4sduzxzlobbgzy5fiufdflg3mo2jyecdwdx5rphrqldms7wlmiid.onion/ >Tor onion version</a> | <a href=https://qertoip.com/ >contact</a> | © 2021 MoneroDocs under <a href=https://opensource.org/licenses/MIT>MIT</a> | built w/ <a href=https://www.mkdocs.org/ >mkdocs</a> and <a href=https://squidfunk.github.io/mkdocs-material/ >squidfunk/material</a> </div> </div> </div> </footer> </div> <script src=../../assets/javascripts/vendor.93c04032.min.js></script> <script src=../../assets/javascripts/bundle.83e5331e.min.js></script><script id=__lang type=application/json>{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.placeholder": "Search", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.term.missing": "Missing"}</script> <script>
|
|
app = initialize({
|
|
base: "../..",
|
|
features: [],
|
|
search: Object.assign({
|
|
worker: "../../assets/javascripts/worker/search.8c7e0a7e.min.js"
|
|
}, typeof search !== "undefined" && search)
|
|
})
|
|
</script> </body> </html> |