The research library

XRP whitepapers.
Go to the source.

Read the original papers behind XRP, Ripple, and the XRP Ledger ecosystem. This curated library brings together consensus research, RLUSD, tokenization, and technical standards, with author details, dates, and context that separates historical designs from current documentation. Every available document links to its original publisher or research repository.

Explore the library Where to start

Two papers.
A stronger foundation.

Read the original design with the later analysis.

2014 · The original paper

The Ripple Protocol Consensus Algorithm

Schwartz, Youngs & Britto

2018 · The deeper analysis

Analysis of the XRP Ledger Consensus Protocol

Chase & MacBrough

The document library

Original sources, with the context to read them well.

How to read this collection

28 of 28 documents in the collection

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XRP LedgerWhitepaperConsensus
The Ripple Protocol Consensus Algorithm
David Schwartz · Noah Youngs · Arthur Britto
Published2014
The foundational 2014 paper introduces the Ripple Protocol Consensus Algorithm and its approach to agreeing on transactions without proof-of-work mining. Start here for the historical design, then read the later consensus analysis for a fuller treatment of safety and liveness.
Read PDFripple.com
Context, version & citation
Historical paper; today’s implementation and documentation have evolved.
2014 edition
Publisher or source record
Citation
David Schwartz, Noah Youngs, Arthur Britto. The Ripple Protocol Consensus Algorithm. published 2014. https://ripple.com/files/ripple_consensus_whitepaper.pdf
XRP LedgerResearch paperConsensus
Analysis of the XRP Ledger Consensus Protocol
Brad Chase · Ethan MacBrough
PublishedFeb 20, 2018
Brad Chase and Ethan MacBrough examine the consensus protocol in detail and derive conditions for safety and liveness. This is the companion to the original RPCA paper for readers exploring trusted validator lists, network assumptions, and the conditions needed to keep the ledger progressing.
Read PDFarxiv.org
Context, version & citation
A separate 2018 analysis, not the original 2014 RPCA paper.
arXiv v1
Publisher or source record
Citation
Brad Chase, Ethan MacBrough. Analysis of the XRP Ledger Consensus Protocol. published Feb 20, 2018. https://arxiv.org/pdf/1802.07242
XRP LedgerResearch paperConsensus
Cobalt: BFT Governance in Open Networks
Ethan MacBrough
PublishedFeb 20, 2018
A research proposal for atomic broadcast in networks with non-uniform trust and no globally agreed membership. Ethan MacBrough explores how an open network can agree on shared rules while tolerating faults and asynchronous communication.
Read PDFarxiv.org
Context, version & citation
Research proposal; inclusion does not mean Cobalt is deployed on the XRP Ledger.
arXiv v1
Publisher or source record
Citation
Ethan MacBrough. Cobalt: BFT Governance in Open Networks. published Feb 20, 2018. https://arxiv.org/pdf/1802.07240
XRP LedgerResearch paperIndependent research
Security Analysis of Ripple Consensus
Ignacio Amores-Sesar · Christian Cachin · Jovana Mićić
PublishedNov 30, 2020
An independent analysis of the Ripple consensus protocol, with an abstract description derived from source code. The authors explore executions that challenge safety and liveness under the paper’s assumptions. Read alongside the original design, later analysis, and current protocol documentation.
Read PDFarxiv.org
Context, version & citation
Findings concern the modeled protocol and assumptions at publication, not a report of a current network incident.
arXiv v1
Publisher or source record
Citation
Ignacio Amores-Sesar, Christian Cachin, Jovana Mićić. Security Analysis of Ripple Consensus. published Nov 30, 2020. https://arxiv.org/pdf/2011.14816
InterledgerWhitepaperPayments
A Protocol for Interledger Payments
Stefan Thomas · Evan Schwartz
Published2015
Stefan Thomas and Evan Schwartz describe payments that cross separate ledgers using conditional transfers and connectors. The paper is useful for tracing the development of payment interoperability and Ripple’s early research in this area.
Read PDFinterledger.org
Context, version & citation
The publisher marks this paper outdated. Consult the linked ILPv4 specification for the current protocol.
Historical paper
Publisher or source record
Citation
Stefan Thomas, Evan Schwartz. A Protocol for Interledger Payments. published 2015. https://interledger.org/documents/interledger.pdf
XRP LedgerWhitepaperTokenization
The Future of Asset Tokenization
Team RippleX
Date not stated
Team RippleX introduces Multi-Purpose Tokens for institutional asset tokenization on the XRP Ledger. The paper explains issuer controls, metadata, and potential uses for financial assets. Pair this publisher-authored overview with XLS-33 when you need the underlying specification.
Read PDFxrpl.org
Context, version & citation
Publisher-authored overview; feature availability should be checked against current XRPL documentation.
10 pages
Publisher or source record
Citation
Team RippleX. The Future of Asset Tokenization: A New Token Standard for Institutional-Grade Finance on XRP Ledger. date not stated. https://xrpl.org/static/pdf/Whitepaper_the_future_of_asset_tokenization.pdf
RippleWhitepaperStablecoins
Ripple USD: A stablecoin for the internet of value
Ripple
UpdatedJun 4, 2026
Ripple’s whitepaper introduces RLUSD, the company’s dollar-backed stablecoin. Use it to understand the issuer’s description of its design and operating model, then consult current product documentation and transparency reports for information that changes over time.
Read PDFripple.com
Context, version & citation
RLUSD and XRP are different assets. This record identifies the June 2026 paper revision.
June 2026 · 12 pages
Publisher or source record
Citation
Ripple. Ripple USD Whitepaper: A stablecoin for the internet of value. updated Jun 4, 2026. https://ripple.com/reports/rlusd-whitepaper.pdf
XRPL ecosystemWhitepaperSmart contracts
Xahau Whitepaper
Xahau
Date not stated
The Xahau launch paper describes a network built from the XRP Ledger codebase with account-based Hooks, its own native asset, and a distinct governance design. The project maintains both a readable web edition and a PDF in its official repository.
Read sourcegithub.com
Context, version & citation
Xahau is a separate network. Its Hooks support does not establish support on XRPL mainnet.
Official web and PDF editions
Publisher or source record
Citation
Xahau. Xahau Whitepaper. date not stated. https://github.com/Xahau/Whitepaper/blob/main/Xahau-Whitepaper.pdf
XRPL ecosystemWhitepaperSmart contracts
Evernode: Seriously smart contracts for the XRPL Ecosystem
Evernode Labs Pty Ltd
UpdatedJan 12, 2024
Evernode Labs describes a decentralized hosting network for applications, combining off-chain execution with coordination through Xahau. The paper covers the relationship between application hosts, network registration, and the Evers token.
Read PDFraw.githubusercontent.com
Context, version & citation
Evernode uses Xahau. It is not a native smart-contract feature of XRPL mainnet.
Whitepaper 2.0
Publisher or source record
Citation
Evernode Labs Pty Ltd. Seriously smart contracts for the XRPL Ecosystem — Evernode Whitepaper 2.0. updated Jan 12, 2024. https://raw.githubusercontent.com/EvernodeXRPL/whitepaper/main/Evernode%202.0.pdf
Historical archiveWhitepaperTokenizationSource moved
Coreum: An Enterprise Grade Blockchain
Coreum
PublishedFeb 2023
The February 2023 technical paper describes Coreum’s enterprise blockchain design, Smart Tokens, and use of Cosmos technologies. This historical record is retained for readers following the broader XRP ecosystem, but the original publisher download no longer resolves to the paper.
Original download unavailableHistorical record
Context, version & citation
The former PDF address redirects to TX’s website. No working original download is offered here.
Version 2.0 · source moved
View current project publications
Citation
Coreum. Coreum: An Enterprise Grade Blockchain — Technical White Paper v2.0. published Feb 2023. https://allaboutxrp.com/whitepapers#paper-coreum Original source moved; historical catalog record.
FlareWhitepaperInteroperability
Flare Confidential Compute
Flare
ListedJul 6, 2026
A Flare paper on using trusted execution environments to connect on-chain instructions with external computation. It introduces a framework for protocol-managed wallets, compute extensions, and expanded data connectivity.
Read PDFdev.flare.network
Context, version & citation
Flare is a separate network. The title concerns Flare infrastructure, not native XRP Ledger features.
Publisher listing date
Publisher or source record
Citation
Flare. Flare Confidential Compute: Powering Interoperability for Flare through TEEs. listed Jul 6, 2026. https://dev.flare.network/pdf/whitepapers/20260706-FlareConfidentialCompute.pdf
FlareWhitepaperInteroperability
The Flare Data Connector
Flare
ListedJan 14, 2025
The Flare Data Connector paper describes a system for attesting to events outside Flare and making that information available to applications on the network. It provides context for understanding how external-chain data can support cross-network use cases.
Read PDFdev.flare.network
Context, version & citation
The publisher listing date differs from the PDF filename. Check the document for revision details.
Publisher listing date
Publisher or source record
Citation
Flare. The Flare Data Connector. listed Jan 14, 2025. https://dev.flare.network/pdf/whitepapers/20240224-FlareDataConnector.pdf
FlareWhitepaperOracles
FTSOv2: More data feeds and faster updates
Flare
ListedSep 9, 2024
A technical overview of the second version of the Flare Time Series Oracle. It explains changes to data-feed delivery and update mechanisms, providing context for applications that use price and other time-series data on Flare.
Read PDFdev.flare.network
Context, version & citation
Oracle research for Flare; the listing date and PDF filename differ.
Publisher listing date
Publisher or source record
Citation
Flare. FTSOv2: more data feeds and faster updates to the FTSO. listed Sep 9, 2024. https://dev.flare.network/pdf/whitepapers/20240223-FlareTimeSeriesOracleV2.pdf
FlareResearch paperMachine learning
Consensus learning
Flare
ListedFeb 25, 2024
This research examines a decentralized approach to ensemble machine learning, combining peer-to-peer consensus with learning methods. It belongs to the broader Flare research collection and is supplementary reading rather than an XRP protocol specification.
Read PDFdev.flare.network
Context, version & citation
The developer and marketing indexes display different dates. This record follows the developer index.
Publisher listing date
Publisher or source record
Citation
Flare. Consensus learning: A novel decentralised ensemble learning paradigm. listed Feb 25, 2024. https://dev.flare.network/pdf/whitepapers/20240225-ConsensusLearning.pdf
FlareWhitepaperNetwork design
The Flare network and FLR token
Flare
ListedDec 30, 2022
An overview of Flare’s network and native token, including the relationship between its data protocols, consensus, and governance. This paper gives readers a foundation before exploring the more focused FDC and FTSO papers.
Read PDFdev.flare.network
Context, version & citation
Historical network overview. Verify current network and token details in Flare’s documentation.
Publisher listing date
Publisher or source record
Citation
Flare. The Flare network and FLR token. listed Dec 30, 2022. https://dev.flare.network/pdf/whitepapers/20221231-TheFlareNetworkAndFLRToken.pdf
FlareResearch paperCryptography
A hybrid post-quantum digital signature scheme for the EVM
Flare
ListedJul 5, 2022
Research into combining established and post-quantum signature methods for Ethereum Virtual Machine transactions. It is included as related cryptographic research from Flare’s publication library.
Read PDFdev.flare.network
Context, version & citation
A research design, not evidence that XRP or every EVM network uses this signature scheme.
Publisher listing date
Publisher or source record
Citation
Flare. A hybrid post-quantum digital signature scheme for the EVM. listed Jul 5, 2022. https://dev.flare.network/pdf/whitepapers/20220722-HybridPostQuantumDigitalSignatureSchemeForTheEthereumVirtualMachine.pdf
FlareWhitepaperConsensus
Flare Consensus Protocol
Flare
ListedNov 5, 2019
An early paper describing Flare’s approach to consensus through a federated Byzantine agreement construction. It provides historical context for the network’s research lineage.
Read PDFdev.flare.network
Context, version & citation
Published in 2019; consult current Flare documentation before treating it as the operating specification.
Publisher listing date
Publisher or source record
Citation
Flare. Flare Consensus Protocol. listed Nov 5, 2019. https://dev.flare.network/pdf/whitepapers/20191105-FlareConsensusProtocol.pdf
FlareReportOracles
Kraken exchange and FTSO price comparison
Flare
ListedApr 6, 2023
A dated research report comparing Flare Time Series Oracle price feeds with Kraken trade data. It offers a concrete example of evaluating oracle outputs against an external market reference.
Read PDFdev.flare.network
Context, version & citation
Historical comparison report, not a live oracle-quality or price feed.
Research report
Publisher or source record
Citation
Flare. Kraken exchange - FTSO price comparison. listed Apr 6, 2023. https://dev.flare.network/pdf/whitepapers/20230406-KrakenExchange-FTSOPriceComparison.pdf
FlareReportOracles
STP.02: Impact of the secondary FTSO reward band
Flare
ListedMay 29, 2023
An analysis of a Songbird FTSO reward-band change and its observed effects on data providers and feed accuracy. Useful for readers studying oracle incentives and network governance.
Read PDFdev.flare.network
Context, version & citation
Dated impact analysis. Results should not be generalized to today’s provider performance.
Research report
Publisher or source record
Citation
Flare. STP.02 - Impact of secondary FTSO reward band. listed May 29, 2023. https://dev.flare.network/pdf/whitepapers/20230529-SongbirdBandUpdate-ImpactOfSTP02.pdf
XRP LedgerSpecificationNFTs
XLS-20: Non-Fungible Token Support
XRPLF
CreatedMay 24, 2021
The XRP Ledger standard describing native non-fungible tokens and their supporting ledger objects and transactions. Use this specification for protocol details beyond a general NFT introduction.
Read sourcexls.xrpl.org
Context, version & citation
Specification status and mainnet amendment activation are different facts.
XLS specification · Specification status: Final
Publisher or source record
Citation
XRPLF. XLS-0020: Non-Fungible Token Support. created May 24, 2021. https://xls.xrpl.org/xls/XLS-0020-non-fungible-tokens.html
XRP LedgerSpecificationDeFi
XLS-30: Automated Market Maker
XRPLF
CreatedJun 30, 2022
The specification for native automated market makers on the XRP Ledger. It covers the mechanics needed to understand liquidity pools, LP tokens, and the interaction between AMMs and the ledger’s exchange functionality.
Read sourcexls.xrpl.org
Context, version & citation
Read current amendments and implementation documentation for deployed behavior.
XLS specification · Specification status: Final
Publisher or source record
Citation
XRPLF. XLS-0030: Automated Market Maker on XRPL. created Jun 30, 2022. https://xls.xrpl.org/xls/XLS-0030-automated-market-maker.html
XRP LedgerSpecificationTokenization
XLS-33: Multi-Purpose Tokens
XRPLF
CreatedAug 5, 2022
The technical standard for Multi-Purpose Tokens on the XRP Ledger. Read it alongside the asset-tokenization whitepaper to distinguish the token standard’s defined behavior from broader institutional use cases.
Read sourcexls.xrpl.org
Context, version & citation
A protocol specification, not a standalone project whitepaper.
XLS specification · Specification status: Final
Publisher or source record
Citation
XRPLF. XLS-0033: Multi-Purpose Tokens (MPTs). created Aug 5, 2022. https://xls.xrpl.org/xls/XLS-0033-multi-purpose-tokens.html
XRP LedgerSpecificationIdentity
XLS-40: Decentralized Identity
XRPLF
CreatedMar 30, 2023
The standard describing decentralized identifiers on the XRP Ledger. It is a reference for understanding the ledger’s role in identity records and the boundary between on-chain identifiers and the systems that use them.
Read sourcexls.xrpl.org
Context, version & citation
Identity records do not by themselves verify a person or an organization.
XLS specification · Specification status: Final
Publisher or source record
Citation
XRPLF. XLS-0040: Decentralized Identity on XRP Ledger. created Mar 30, 2023. https://xls.xrpl.org/xls/XLS-0040-decentralized-identity.html
XRP LedgerSpecificationDeFi
XLS-65: Single Asset Tokenized Vault
XRPLF
CreatedApr 12, 2024
A specification for pooling a single asset in a tokenized vault on the XRP Ledger. It is a useful companion to the lending protocol proposal for readers examining how vault shares and shared assets are represented.
Read sourcexls.xrpl.org
Context, version & citation
The standards index lists this specification as Draft at the review date. This is not a mainnet activation claim.
XLS specification · Specification status: Draft
Publisher or source record
Citation
XRPLF. XLS-0065: Single Asset Tokenized Vault. created Apr 12, 2024. https://xls.xrpl.org/xls/XLS-0065-single-asset-vault.html
XRP LedgerSpecificationDeFi
XLS-66: Lending Protocol
XRPLF
CreatedOct 18, 2024
The XRP Ledger lending protocol specification describes the proposed mechanics for loans and their lifecycle. Read it together with the single-asset vault specification to understand how the designs relate.
Read sourcexls.xrpl.org
Context, version & citation
The standards index lists this specification as Draft at the review date. Check current amendments separately.
XLS specification · Specification status: Draft
Publisher or source record
Citation
XRPLF. XLS-0066: Lending Protocol. created Oct 18, 2024. https://xls.xrpl.org/xls/XLS-0066-lending-protocol.html
XRP LedgerSpecificationCryptography
XLS-96: Confidential Transfers for MPTs
XRPLF
CreatedJan 15, 2026
The specification for confidential transfers involving Multi-Purpose Tokens. It describes privacy-related functionality for this token model and provides a technical starting point for readers researching confidential assets on the XRP Ledger.
Read sourcexls.xrpl.org
Context, version & citation
Final in the standards index does not establish that the feature is enabled on mainnet.
XLS specification · Specification status: Final
Publisher or source record
Citation
XRPLF. XLS-0096: Confidential Transfers for Multi-Purpose Tokens. created Jan 15, 2026. https://xls.xrpl.org/xls/XLS-0096-confidential-mpt.html
XRP LedgerDocumentationPayments
XRP Ledger Payment System Specification
XRPLF
Date not stated
The official XRPLF repository explains the XRP Ledger payment system and Payment Engine. It connects the reasoning behind payments with concepts such as trust lines, order books, and AMMs.
Read sourcegithub.com
Context, version & citation
Living technical documentation. It can change independently of historical papers.
Living documentation
Publisher or source record
Citation
XRPLF. XRP Ledger Payment System Specification. date not stated. https://github.com/XRPLF/dex-docs
XRPL ecosystemDocumentationSmart contracts
XRPL EVM: Architecture and overview
XRPL EVM documentation
Date not stated
The official introduction to the XRPL EVM Sidechain explains its architecture, EVM compatibility, and relationship to the XRP Ledger. It is the starting point for understanding its separate consensus and interoperability model.
Read sourcedocs.xrplevm.org
Context, version & citation
Official documentation; no standalone whitepaper was verified. The sidechain is a separate network.
Living documentation
Publisher or source record
Citation
XRPL EVM documentation. What is the XRPL EVM?. date not stated. https://docs.xrplevm.org/pages/users/introduction/what-is-the-xrplevm

Which XRP whitepaper should you read first?

Start with the 2014 consensus paper for the original design, then read the 2018 analysis for its safety and liveness assumptions. Choose an ecosystem paper only after identifying the network it describes. For implementation work, use current specifications and documentation alongside the historical research.

New to consensus? Start with the guide

Understand the original design
Read RPCA, then compare its assumptions with the later analysis and independent security research.
Start with the 2014 paper
Follow the topic you are researching
For tokenized assets, pair the MPT overview with XLS-33. For Ripple’s stablecoin, read the dedicated RLUSD paper.
Explore asset tokenization
Check what applies today
Reconcile the publication date with current documentation. A proposal or a Final specification is not proof of mainnet activation.
Check current XRPL amendments

How are documents selected?

We prioritize original publishers, official project repositories, and author-submitted research. Each record identifies the document type, the date available from its source, and its relationship to XRP or the wider ecosystem. Historical and unavailable sources remain labeled, and inclusion is not a recommendation to buy or use a project.

Source checks, not a protocol audit. We checked links and bibliographic information on Sep 4, 2026. A reachable PDF is not evidence that its claims remain current. This is a curated collection, not every paper ever published about an XRPL token.

Dates retain their meaning. “Published” and “Updated” refer to the recorded paper date. XLS entries show their creation date. Flare entries use the developer library’s listing dates, which may differ from dates in filenames. Unknown dates remain unstated.

Read from the original source. Available documents open at their publisher or research repository. We do not claim authorship of third-party papers. The historical Coreum record is retained with its moved download clearly marked.

Editorial standards Trusted sources Suggest a paper or correction

Questions about XRP whitepapers

A few distinctions that make the reading easier.

What is the original XRP whitepaper?

The Ripple Protocol Consensus Algorithm, published in 2014 by David Schwartz, Noah Youngs, and Arthur Britto, is the foundational consensus paper commonly called the XRP whitepaper. It describes the original consensus design. The separate 2018 analysis by Brad Chase and Ethan MacBrough examines the protocol’s safety and liveness in greater detail.

XRPL consensus research index

Where can I read XRP and Ripple whitepapers?

Use the original publisher’s PDF, official documentation, or the authors’ research repository. This library brings those sources together for XRP Ledger consensus, RLUSD, tokenization, and related ecosystem projects. Each record identifies its document type and source. The Read PDF and Read source links open the original material rather than a rewritten copy.

Browse the document library

Are XRP, Ripple, and RLUSD covered by the same paper?

No. XRP is the XRP Ledger’s native asset, Ripple is a company, and RLUSD is a separate stablecoin. Consensus papers explain the ledger’s agreement process; the RLUSD whitepaper describes Ripple’s stablecoin. A paper about one does not establish the properties, risks, or current operating details of the others.

Ripple’s RLUSD documentation

What is the difference between a whitepaper and an XLS specification?

A whitepaper explains a design, proposal, or project at its publication date. An XRP Ledger Standard, or XLS, specifies particular protocol or ecosystem behavior. Standards can be revised and have editorial states such as Draft or Final. That status is distinct from whether a corresponding amendment is enabled on the live network.

XRP Ledger Standards

Are Xahau, Evernode, and Flare part of XRPL mainnet?

They are related ecosystem subjects, but their networks and features are not interchangeable with XRPL mainnet. Xahau is a separate network, Evernode uses Xahau for coordination, and Flare operates its own network. The library labels these collections separately so a project paper is not mistaken for native XRP Ledger functionality.

Evernode’s network description

Does an old whitepaper describe how a network works today?

Not necessarily. Whitepapers preserve a design at a point in time, while implementations, amendments, and product terms can change. Check the publication or revision date and read the record’s context note. For present-day protocol behavior, follow current official documentation and amendment records as well as the historical paper.

Current XRPL consensus documentation