PDF Publication Title:
Text from PDF Page: 055
• It should allow users to recover their credentials in case of loss or theft. • It should not require knowledge of contracts or manually calling contract methods. • It should have reasonable latency for a login system (no more than a couple of seconds). • It should not cost users gas (or money) to login. • It should be reasonably easy for developers to implement in their apps. One of the biggest problems with our initial approach was that writes were necessary. This forced users who wanted to log in to spend Ether to do so. Worse, they had to wait for confirmation of the transaction before the login was successful. On the other hand, this made the login process truly decentralized. Writes were a requirement for our previous system due to the way Ethereum events work. Events are special operations in the Ethereum network that can be watched by nodes. Internally, events are Ethereum Virtual Machine ops that create data that is added to the transaction when it is mined. Events do not work on read-only (constant) Solidity functions, since they are added to a transaction when it is mined, this forces users of our first system to pay to generate a LoginAttempt event. This limitation forced us to make a compromise: rather than remain entirely decentralized, we added a server to handle authentication requests. In turn, this server relies on data stored in the Ethereum blockchain. However, our system does retain the ability to allow for serverless logins. We will see how that works later on. Another big limitation of our first system was that the user needed access to his Ethereum wallet to login. This is impractical for several reasons: • Users usually keep a single wallet. In other words, they do not carry around their private keys to easily use them on different devices. • If a user loses his or her Ethereum private key, he may never be able to authenticate again with that address to a third party service, not even to switch his main address or recover his information. This poses a problem for long term use of the system. • Requiring a user to use his or her private key for each login can be a security issue for accounts holding big amounts of value. For those accounts, private keys may be stored safely and used only when necessary. Requiring their use for each login is less than ideal. So some way of using an Ethereum address to login without requiring the private key for that address must be implemented for our new system. 3.3 A Login System for Ethereum Users So, here is what we implemented. Our system relies on three key elements: an authentication server, a mobile application, and the Ethereum network. Here’s how they play together. 53PDF Image | Intro to Ethereum and Smart Contracts
PDF Search Title:
Intro to Ethereum and Smart ContractsOriginal File Name Searched:
intro-to-ethereum.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |