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      "body": "Congratulations @madhavanmalolan! You received a personal award!\n\n<table><tr><td>https://steemitimages.com/70x70/http://steemitboard.com/@madhavanmalolan/birthday1.png</td><td>Happy Birthday! - You are on the Steem blockchain for 1 year!</td></tr></table>\n\n<sub>_You can view [your badges on your Steem Board](https://steemitboard.com/@madhavanmalolan) and compare to others on the [Steem Ranking](http://steemitboard.com/ranking/index.php?name=madhavanmalolan)_</sub>\n\n\n**Do not miss the last post from @steemitboard:**\n<table><tr><td><a href=\"https://steemit.com/japanese/@steemitboard/new-japanese-speaking-community-steem-meetup-badge\"><img src=\"https://steemitimages.com/64x128/https://cdn.steemitimages.com/DQmRWbAjbeETEaqSPLcpwYX1JN5pZhdPffv4q6DaBs6xvZm/image.png\"></a></td><td><a href=\"https://steemit.com/japanese/@steemitboard/new-japanese-speaking-community-steem-meetup-badge\">New  japanese speaking community Steem Meetup badge</a></td></tr></table>\n\n###### [Vote for @Steemitboard as a witness](https://v2.steemconnect.com/sign/account-witness-vote?witness=steemitboard&approve=1) to get one more award and increased upvotes!",
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      "author": "grammarnazi",
      "body": "You have a minor misspelling in the following sentence: <blockquote> By having a standardised AppLink app developers can leverage the existance of other ethereum wallets on the user's phone to sign and send transactions.</blockquote> It should be <i>existence</i> instead of <i>existance</i>.",
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      "body": "```\n---\neip: <to be assigned>\ntitle: Standardized AppLink for signing ETH Transactions using an installed wallet on mobile\nauthor: Madhavan Malolan (@madhavanmalolan)\nstatus: Draft\ntype: Interface\ncreated: 2018-08-29\n---\n```\n## Simple Summary\nProposing standardizing the `ethpay://` URI (AppLink) so that native app developers can invoke user's wallets to sign transactions.\n\n## Abstract\nProposing a simple mechanism that will allow developers to build DApps as native apps without having to maintain the users' wallets/private keys. DApps today are built primarily on the web because of the access to Web3 injections, but the user experience is lacking. Native apps provide a much richer experience. A MetaMask equivalent for native apps will help the developer community a long way.\n\n## Motivation\nApp developers today need to maintain the private keys and keep pace with the changes happening on the Web3 libraries. A large majority of people have some ethereum Wallet installed on their phone which already maintains their keys and accounts. Why should every app developer have to re-invent the wheel by building the entire wallet stack into their app? By having a standardised AppLink app developers can leverage the existance of other ethereum wallets on the user's phone to sign and send transactions.\n\n## Specification\nThe AppLink will be an URI of scheme `ethpay://`\n\n### Possible actions\n- `sign` : The wallet signs the data sent to it and redirects to a URI also specified in the request with the signature as a query parameter\n- `sendSignedTransaction` : The wallet signs a transaction and sends it to an Ethereum Node\n\n### Allowed parameters\n- `action` : may be one of `sign` or `sendSignedTransaction`\n- `to` : An Ethereum Address to which the transaction is to be sent. Required if action is `sendSignedTransaction`\n- `value` : Integral value of number of Wei to include in the transaction. Optional.\n- `data` : Data that needs to be signed. If action is `sendSignedTransaction` this should be hex encoded. Required if type is `sign`\n- `gas` : Amount of gas to be used in the transaction. Required if action is `sendSignedTransaction`\n- `gasPrice` : Gas price for the transaction. Optional. If not provided for action `sendSignedTransaction`, current gas price will be used.\n- `redirectUri` : The URI to which the wallet should redirect with signature after signing. Used only for action `sign`.\n\n\n## Rationale\nThe URI based AppLinks will allow app developers to request signing of transactions without needing to use any external library.\nThe users will not have to trust the app developer with their private keys, since it is maintained by a separate wallet app they already use.\n\n## Implementation\nA rough implementation of this protocol has been done using [Web3 1.0.0-beta](https://github.com/ethereum/web3.js) on a [React Native](https://facebook.github.io/react-native/) app. It uses [Infura](https://infura.io) as an Ethereum node.\n\nThe implementation handles App Links and a basic implementation of an ETH wallet.\n\nYou can find the [app's implementation here](https://github.com/madhavanmalolan/ethpay)\n\n## Join the discussion\nJoin the discussion on [GitHub](https://github.com/ethereum/EIPs/issues/1361)\n\n## Copyright\nCopyright and related rights waived via [CC0](https://creativecommons.org/publicdomain/zero/1.0/).",
      "json_metadata": "{\"tags\":[\"android\",\"ios\",\"ethereum\",\"wallet\",\"dapp\"],\"links\":[\"https://github.com/ethereum/web3.js\",\"https://facebook.github.io/react-native/\",\"https://infura.io\",\"https://github.com/madhavanmalolan/ethpay\",\"https://github.com/ethereum/EIPs/issues/1361\",\"https://creativecommons.org/publicdomain/zero/1.0/\"],\"app\":\"steemit/0.1\",\"format\":\"markdown\"}",
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      "permlink": "ethpay-apple-pay-for-eth",
      "title": "ETHPay : Apple pay for ETH"
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      "body": "```\neip: ERC 1115\ntitle: DAuth - Decentralized authentication mechanism for DApps\nauthor: madhavanmalolan\ndiscussion-to: [email protected]\nstatus: Draft\ntype: Standards Track\ncategory: ERC\ncreated: 2018-05-23\n```\n# Simple Summary\nThis is an authentication mechanism like _\"Login with Facebook\"_ and _\"Sign in with Google\"_ that is completely decentralized and helps DApps authenticate users.\n\n# Abstract\nDAuth is a specification for an alternative to OAuth that allows DApps to accept user logins in a completely decentralized way - helping the DApp acertain the Ethereum address owned by the user. This login uses a familiar username-password pair that would allow logins to happen from any device or environment without the need for external libraries and extensions like Web3.\n\n# Motivation\nMany DApps that perform some form of personalization need to identify the user. Consider, for example, the case of a popular DApp - [CryptoKitties](https://cryptokitties.co). CryptoKitties is a web based DApp and allows users to view, buy, sell and _breed_ CryptoKitties. The only way to login into the application is using MetaMask which is a Web3 injector. It is not possible to view _My kitties_ using a device that doesn't have MetaMask installed even if I do not intend to make any transactions.\n\nDAuth will enable DApps to allow users to establish their identity by proving the ownership of their Ethereum address. \n\n# Design \nWe first describe the _Authentication Game_ which takes place to authenticate a user.\n\n## 0. Registration\nA user registers by setting up a HTTP server (called the Dauth server). The user generates a password and a public-private key pair and stores the private key and the hash of the password on the server. Then, registers a username on the smart contract by providing the desired username, the public key and the address of the DAuth server.\n\nAll usernames on the contract are unique.\n\n## 1. DApp Login\nTo login into a DApp, the user provides the following to the endpoint that performs the authentication on the DApp.\n- **Code** : This is a random string that identifies the current authentication session. The authentication will go through only once for a given code.\n- **HashCode** : `sha3(sha3(password), code)`\n- **Username** : The username that was registered and confirmed on the smart contract.\n\nIn order to verify this request, the DApp will fetch the public key and DAuth server address from the smart contract.\n\nThe DApp shall then generate a _Secret_ string - which may be a random string. It will then pass the following parameters to the DAuth server's verification endpoint.\n- **Code** : As provided by the user\n- **HashCode** : As provided by the user\n- **Username** : As provided by the user\n- **Cipher** : The _Secret string_ encrypted using the user's public key\n\n## 2. DAuth server verification\nThe DAuth server on receiving the request from the DApp, fetches the hash of the password and the private key from its database corresponding to the username in the request.\n\nIt then validates if `HashCode = sha3(hash of password, code)`\n\nIf the HashCode is valid, and the code has not been used before, it tries to decrypt the Cipher using the private key and sends the decrypted value back to the DApp\n\n## 3. Verification\nThe DApp may authenticate the user if the response from the DAuth server is the same as the Secret it used to generate the Cipher.\n\n# Specification\n\n## Smart Contract\n### set\n```\n function set(string username, string dauth_url, string public_key) public returns (bool)\n\n event NewUser(address from, string username, bool success);\n```\nMust insert a mapping between the `msg.sender` and the username, DAuth Server address, and public key.\n\nMust  emit `NewUser(address, username, true)` if successfully created, `NewUser(address, username, false)` if it fails.\n### getUsername\n```\n function getUsername(address user_address) public view returns (string)\n```\nReturns the username associated with a given address. Returns a blank string if no username exists for that address.\n\n### getAddress\n```\n function getAddress(string username) public view returns (address)\n```\nReturns the address associated with the username. Returns a blank string if the username is not registered.\n### getDauthUrl\n```\n function getDauthUrl(string username) public view returns (string)\n```\nReturns the DAuth Server address associated with the username. Returns a blank string if the username is not registered. \n### getDauthPublicKey\n```\n function getDauthPublicKey(string username) public view returns (string)\n```\nReturns the public key associated with the username. Returns a blank string if the username is not registered.\n\n\n## DAuth Server\nThe DAuth server must expose two endpoints\n### Verification Endpoint\nThis is the endpoint using a POST request to the DAuth Server address. This takes as parameters\n```\n{\n    username : string,\n    cipher : string,\n    code : string,\n    hashcode : string\n}\n```\n\nIf verification is successful, returns \n```\n200\n{ data : <decrypted value> }\n```\nelse,\n```\n403\n{ data : <reason for failure> }\n```\n\n### Login Page \nThis is a GET request to the DAuth Server address. This takes as query parameter the verifier url.\nOn the webpage it must accept the username and password, generate the code and hashcode and transmit the username, code and hashcode to the verifier (DApp).\n\n\n## DApp\nThe Dapp must provide an endpoint called the _verifier URL_ that is a GET request that can be accessed from a web browser. This endpoint gets the following query parameters : code, hashcode, username. This endpoint may respond accordingly based on the success of the login.\n\n# Implementation\n## Smart Contract\nThe smart contract is hosted on the Rinkeby testnet - [Link](https://rinkeby.etherscan.io/address/0xb19d6bf34cf6cecc50c4a73c38f54defcf9e8f6a)\n\n## DAuth Server\nA user may run a self hosted DAuth Server by cloning [this](https://github.com/madhavanmalolan/dauth/tree/master/server) repository.\nFor the sake of simplicity and a demo, a DAuth Server has been setup at [dauth.co](https://dauth.co) on which users may choose to host their credentials if they are not able to host a server on their own.\n\n## Verifier\nThe DApps may use a the promise based nodejs implementation, which abstracts out all implementation details.\n\n## Source\nAll the code for the smart contract and the Dauth Server are opensourced at [this repository](https://github.com/madhavanmalolan/dauth).\n\n# Demo \nA demo is available at [dauth.co](https://dauth.co)\n\n# More details\nA white paper is made available that digs deeper into technical details : [dauth.pdf](https://github.com/madhavanmalolan/dauth/blob/master/dauth.pdf)\n\nhttps://www.youtube.com/watch?v=Tgnk3pqNxSw\n\n# Participate\nPlease do join in the [discussions on GitHub for ERC 1115](https://github.com/ethereum/EIPs/issues/1115)",
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      "body": "@@ -1254,16 +1254,111 @@\n smile:%0A%0A\n+# Set up%0ASetting it up takes just a few minutes!%0A%0Ahttps://www.youtube.com/watch?v=Tgnk3pqNxSw%0A%0A\n Looking \n",
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      "body": "@@ -1250,15 +1250,8 @@\n is :\n-slight_\n smil\n",
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      "author": "madhavanmalolan",
      "body": "# Introduction\nDAuth is a replacement to OAuth based authentication systems like \"Login with Facebook\", \"Sign in with Google\".\n\n# Motivation\nI was building a DApp, and realized there is no way for the user to deterministically say which ethereum address she owns without using MetaMask or other Web3 providers and are instantaneous.\n\nLet us take the example of CryptoKitties. Though making any transaction like selling/buying should need MetaMask - just viewing my kitties should be possible on any device that may or may not have Web3, using a simple username password.\n\n# Solution\nI created a simple protocol describing the exchange of messages, in a way similar to OAuth. This uses an authentication server that can be self hosted by the user. The identities and the authentication flow is determined by a smart contract.\n\nAll logins are instantaneous and free of transaction costs.\n\n# More information\n## GitHub\n[https://github.com/madhavanmalolan/dauth](https://github.com/madhavanmalolan/dauth)\n\n## Whitepaper \n[dauth.pdf](https://github.com/madhavanmalolan/dauth/blob/master/dauth.pdf)\n\n# Demo \n[https://dauth.co](https://dauth.co)\n\n# Disclaimer\nI am relatively new to designing decentralized systems, I would love to hear your feedback on this :slight_smile:\n\nLooking forward to help the community.",
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      "body": "Congratulations @madhavanmalolan! You have completed some achievement on Steemit and have been rewarded with new badge(s) :\n\n[![](https://steemitimages.com/70x80/http://steemitboard.com/notifications/firstpost.png)](http://steemitboard.com/@madhavanmalolan) You published your First Post\n[![](https://steemitimages.com/70x80/http://steemitboard.com/notifications/firstvoted.png)](http://steemitboard.com/@madhavanmalolan) You got a First Vote\n\nClick on any badge to view your own Board of Honor on SteemitBoard.\nFor more information about SteemitBoard, click [here](https://steemit.com/@steemitboard)\n\nIf you no longer want to receive notifications, reply to this comment with the word `STOP`\n\n> Upvote this notification to help all Steemit users. Learn why [here](https://steemit.com/steemitboard/@steemitboard/http-i-cubeupload-com-7ciqeo-png)!",
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      "body": "This is a non technical overview. \nFor a technical overview [visit this page](https://steemit.com/ethereum/@madhavanmalolan/introducing-dauth-a-decentralized-authentication-mechanism).\n\nWe have for long been aware of social plugins that allow us to login on various websites. \n\nHowever, I can’t login from a different computer into CryptoKitties. The only way to access my kitties is if i am at my primary laptop.\n\nThis felt like a major step back. I decided to fix it.\n\n# There is no way to authenticate on Ethereum\n## No decentralized solution\n\nOAuth that Facebook, Google and Twitter use for their service login use OAuth and are highly centralized. This is a major let down for any service that aims to be truely de-centralized.\n## No way to authenticate claims\n\nAs of today there is no good way to map a user to his or her Ethereum address.\n\n## No human readable identifiers\n\nThe only way to identify some entity on Ethereum is using the address, which is hard to remember and not human friendly at all.\n\n## No way to decouple identity from payment\n\nMost authentication procedures i have seen on this use the public-private keys associated with the Ethereum address. So, if the keys are compromised — so are the Ethers.\n\n## No way to authenticate remotely\n\nTo login using a Ethereum account you usually need to have MetaMask installed on your browser and this browser is the only place where you can use the login. You cannot login from your iPad.\n\n## No way to authenticate without paying\n\nMany solutions expect you to make a transaction and pay the transaction fees associated with it to merely login.\n\n## Non trivial to integrate\n\nUsing existing login mechanisms on Ethereum expect you to setup an Ethereum Node and use Web3 to authenticate.\n\n# Welcome DAuth\n## DAuth is decentralized\n\nBuilding on the simplicity of OAuth, DAuth is a simple authentication protocol that doesn’t rely on a central authority. Anyone can setup their own DAuth servers\n\n## DAuth verifies address claims\n\nDAuth provides a way for users to claim that they own a certain Ethereum address.\n\n## DAuth addresses are human readable\n\nDAuth uses usernames instead of addresses. This makes it easy to remember identities.\n\n## DAuth is decoupled from payments\n\nDAuth’s keys used for authentication are different from the ones used for Ethereum transaction signatures. This makes sure that the Ethers are never compromised\n\n## DAuth is in the cloud\n\nOnce registered, you can login using DAuth from any device anywhere in the world\n\n## DAuth is free\n\nUsers don’t have to make any payment to access the service.\n\n## DAuth is trivial to integrate\n\nDAuth integration is very similar to an OAuth integration, no new technologies involved!\n\n## DAuth is open sourced!\n\nCheck out the [Github Repo](https://github.com/madhavanmalolan/dauth)\n\n# Demo\n[dauth.co](https://dauth.co)\n\nI look forward to your comments.",
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      "body": "@therealwolf 's created platform smartsteem scammed my post this morning (mothersday) that was supposed to be for an Abused Childrens Charity.  Dude literally stole from abused children that don't have mothers ... on mothersday.  \r\n\r\nhttps://steemit.com/steemit/@prometheusrisen/beware-of-smartsteem-scam",
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      "body": "✅  @madhavanmalolan, congratulations on making your first post! **I gave you an upvote!**<br><br>**Please give me a follow** and take a moment to read [this post](https://steemit.com/spam/@pleasestop/introducing-pleasestop-here-to-reduce-comment-spam) regarding commenting and spam.<br>(tl;dr - if you spam, you will be flagged!)",
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      "author": "madhavanmalolan",
      "body": "# Tech Overview : A decentralized authentication mechanism for Ethereum\n\nDAuth is to Ethereum what OAuth is to the web.\n\nHere, I describe briefly the architecture of how DAuth works.\n# Participants\n## User\n\nThe person who wants to login using credentials on the Dauth System.\n## Client\n\nA service that wishes to authenticate a user using the Dauth System.\n## Dauth Provider\n\nA server that will authenticate a user’s claim of credentials and pass on the verification to the client. This server may be hosted by the user or may use a server setup by a person or an organization she trusts. A Dauth provider exposes 2 endpoints — login page, verification REST API.\n\n# Flow of control\n## User registration\n\nThe authentication is controlled by a smart contract. To register on DAuth, a user should bind her ethereum address with the following parameters, all stored on the blockchain :\n- **Username** : All usernames on the Dauth system are unique, thereby removing the need to remember complicated keys.\n- **Public Key** : Each Dauth user has a public-private key pair that will be used for authentication. This key is independent of the keys used to sign transactions. This keeps the Ethers decoupled with authentication.\n- **DAuth Provider address** : Every user may choose a DAuth Provider. This may be self hosted or on a server providing Dauth as a service. This Provider is responsible for maintaining the Private key associated with the above mentioned Public Key.\n- **Verifiers** : A list of Dauth accounts that have verified this address. Eg. “An email address has been verified by Google”, “A phone number has been verified by True Caller” — This allows clients to use Dauth for services that needs a unique login (fighting sybil). The verifiers can add a new entry to the list of verifiers for any user, and mentioning the type of verification (“email”, “phone”, “facebook”)\n\n## Registration with a Dauth Provider\n\nThe user must provide the following to the Dauth Provider\n\n- **Password** : The user must provide a password that must be used by the Dauth Provider to validate that the authentication claims are indeed arising from the user claimed by the client.\n- **Private Key** : This is the private key associated with the public key stored on the blockchain associated with the users’ address.\n\n## Authentication\n\n- **Presenting login page 1**. The client must redirect the user to a page that accepts the user’s username and redirects the user to the login page on the DAuth Provider. The Dauth provider address must be fetched from the blockchain. It must pass a redirect url to the login page 2.\n- **Presenting login page 2**. This is the login page on the Dauth Provider. The user must verify that she has been redirected to the correct Dauth Provider (by validating the URL or any other identification like UI or display text), and enter the password. Once the password has been entered, two strings are generated. \n    - **Code** : A random string\n    - **CodeHash** : SHA256(Code, Password)\n    The Code and the CodeHash are passed to redirectURL, which is the endpoint exposed by the client.\n    - **Redirect URL verification** : The client receives the Code and CodeHash on the Redirection URL endpoint as a POST request. This endpoint must pass the following parameters on a POST request to the Dauth Provider’s second endpoint — verification api :\n    - **Code** : The code that this endpoint received from the login page 2\n    - **CodeHash** : The code hash this endpoint received from the login page 2\n    - **MessageCipher** : A random string encrypted using the user’s public key.\n    - **Username** : username received from the login page 2\n    Verification API. The verification api verifies that the CodeHash = SHA256(Code, Password) of the user identified by the username. If true, it decrypts the MessageCipher using the registered private key and sends that back as a response.\n    Final authentication. The client receives the decrypted message as a response to the call to verification api. It may then verify that the random string that was encrypted using the public key is the same as the string that it received in response. If true, it may proceed with a successful authentication for the user.\n\n# Demo\n\nTry it out at [https://dauth.co](https://dauth.co)\n\n# Source Code\n\nYou may check out the smart contract, Dauth Provider and Client code on [github](https://github.com/madhavanmalolan/dauth).",
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