OVERVIEW We’ll build mobile and browser apps that will allow users to save their logins encrypted on the cardano blockchain using transaction metadata. Passwords and sensitive information are never lost, no central server required and no recurring fees.   The idea is to bring regular users to the cardano blockchain without them even knowing they are using it. On the surface the app will be a regular password manager, with the option to buy credit (with credit card) for saving information to the blockchain. There will be a “bait” to attract new people into cardano in the app through the option to load credit using ADA as well (cheaper than buying credit the regular way). Our goal to showcase what can be built on top of this technology, bring more utility to the general user who doesn’t even know what crpto is, and hopefully educate and incentivize people to join our ecosystem.   VALUE PROPOSITION We propose a DApp that runs as browser extensions and mobile apps, and allows users to automatically generate secure passwords for any websites they are visiting, then save any logins & passwords, bookmarks or other information that must remain secure (such as account recovery codes). Auto-completion of details such as credit card information and personal addresses, etc How it will work: Users will install the extension or app and be presented with two options for setting the password manager on the new device: (1) New Secret Profile

this will present the user with a seed phrase like a regular wallet, the profile name (optional), and a master password for the secret profile. the encryption algorithm to be used to encrypt user data locally and on the blockchain. AES will be the default. (2) Restore Secret Profile the user will be asked for the seed phrase of an existing profile, and the master password for it. If you provide a seed phrase from one of your existing cardano wallets, it will work fine. That could include wallets managed by hardware devices such as ledger/trezor the profile name will be loaded automatically from the corresponding wallet metadata - if empty then the user will be asked to provide a name Multiple profiles can be created, such as “my logins”, “credit cards” and “work”. Whenever some secret information is saved, it will be stored locally and associated with a given profile. Everything encrypted using the private key that’s protected by the master password. You can optionally provide a master password for each profile. When websites are visited and a password field is detected, the extension will offer to fill the password if it’s been registered. At that time, the user will be asked for the master password to decrypt the details and fill in the form on screen. If it’s an unknown password, DaPassword will allow you to input the password or simply generate one for you. The password generation process can be configurable similarly to what commercial products like LastPass offer (select password length, allowed characters, etc). Everything works locally and anonymously. Your details will be stored on the blockchain whenever you choose to do it. If you have many logins and other details to import on an initial setup, all of them can be persisted locally first, then with a single transaction saved on the blockchain, substantially reducing your costs. User who have no idea what cardano is and what a blockchain is, won’t have to learn it. When attempting to save their credentials, they’ll be offered the option to “buy credit”, which will essentially load ADA in their app under the hood to enable transactions to take place to persist their data. ADA holders will be able to simply transfer their ADA to a receiving address exposed by the application with no additional cost. As everything will be stored on the blockchain, users can restore their secret profiles in multiple devices and all their updates will be picked up automatically from the blockchain, including the “available credit” to persist new logins and secret information. Also the full history of previous passwords will be accessible to the user. EXPECTATIONS We plan to deliver browser extensions (Chrome, Firefox, Opera, maybe Safari if budget allows), as well as Android and iPhone apps with the same functionality. Mobile apps will provide integrations with the underlying operating system. IP/COPYRIGHT The entire source code of this project will be available on github under the GPL V2.0 license and we hope other community developers can build on top of this to create even better solutions in the future. PROPOSED LAUNCH Within 6 months PROJECT SUSTAINABILITY: We plan to monetize on the “load credit” functionality which allows regular users (not ADA investors) to save the encrypted data as transaction metadata. Also from rewards collected by the SHOP stake pool. RISKS There are a some elements of risk around the proposed solution, namely: Even though no data will ever be stored in a central server, user’s individual devices might be compromised by a targeted hack and their credentials be stolen. The user might lose their seed phrase or forget the master password, rendering all information stored and purchased credit unavailable and irrecoverable. These will have to be addressed by a proper end user license agreement written by our lawyers. METRICS Code activity can be measured from commits on github. ACTIVITY BREAKDOWN Build, deploy and test on different devices (android, iOS, browsers) Define metadata structure for storing all information securely on the blockchain, properly encrypted. Add support for interacting with the cardano blockchain: send transaction with metadata, retrieve it, create and restore backend-wallet Implement secure password generation, following rules mandated by different websites (one number, one uppercase, one symbol, etc) Enable the use of google authenticator as part of the process to unlock the password for a given login (this requires a centralized server) Implement form auto-completion features (logins, addresses, names, etc) Create “load credit” function to allow end users to use credit/debit cards to buy credit (which in the backend will be converted to ADA) Create a webstite for this app.

Create a “how this works” marketing piece for the “buy credit with ADA” option with the hope to bring awareness into cardano, its usefulness, and potentially bring more people into the ecosystem. FUTURE PLANS We plan to build support for file uploads of any size, which will be stored encrypted in cloud servers (Amazon S3 for example). Investigate Single Sign On, Multisig, family sharing and alternative recovery options. Thank you for your support! COST: $65/hour * 20 days/month * 6 months * 7 hours/day = 54,600