Just a few years ago, a solution was found to build a Trust Machine – distributed ledger was a fact. The first thing that people started to write down in the ledger were records about a financial transaction that everyone could trust, and so Bitcoin was born.
We live in a world full of distrust. And in case of misfortune, we must prove that certain facts were intact.

We use distributed ledger technology for its intended purpose, trust. Data about the events that occurred are recorded. There is no need anymore to prove anything, distributed ledger solves the problem of distrust.
Suddenly we have a way to make the world better and our lives safer, with a global system of confirmation of event existence!

Distributed ledger is a sophisticated technology. Bridges are needed between the user and the technology. These bridges are user interfaces, allowing users to transfer data to the system about events recorded in any form - photos, videos, chats, audio recordings or documents.

Now, we have developed all the main interfaces possible for you.
Our Product
SilentNotary is an ecosystem which develops around Smart Contract, ensuring the evidence of existence and permanence of certain events.

To achieve the goal of a global solution, various user interfaces have been developed, which are as follows:
1. Chatbots for Facebook messenger and Telegram bots are developed to record information, available in production and beta-versions. Chatbots are installed on almost all smartphones. They are convenient and common for users. They allow us to record video, send files, and communicate with many users in real time.
2. Web interface (developed and available in beta-version).
3. Mobile applications for Android and iOS Apps have been developed and available now in AppStore and Playmarket.
4. Mail-bot has been developed and is available in production version. It is used to certify e-mails and records written communication with any number of counter agents.
5. API for IoT solutions, integration with applications and corporate systems.

To promote the product in the global market, it was necessary to adapt it for different categories of customers:
1. B2C (Business to Consumer): The
2. simplest interface, understandable to the common user and can be integrated with social Networks.
3. B2B (Business to business): License scheme, corporate accounts (available in beta version), access delimitation, and API for integration with corporate document management systems available.

Use Cases
In which cases do we need SilentNotary and what can it do to help? Let’s study several examples of legal relations, which may require delivery of evidence:

1. Performed work, rendered services It will be easy to record the results at each stage of the process. Just launch the messenger and send images or video files of the results to the SilentNotary chatbot. You can share the received link with the employer. By doing so, you will be able to prove the fact that, at that moment, the work was completed. If the work was not finished within the agreed timescale or there were deficiencies detected, the employer can do the same and record the problem in the format of certified images or video. Certified records can be used for preparation of acceptance, certificates for work performed, or objections as to quality and timescale claims.
2. Communication via e-mail Letters of critical importance can be saved and certified by just adding the SilentNotary address into the list of recipients. The system certifies the letter content and data from the mailing servers (RFC-title of the letter). It means that the list of recipients, the fact of dispatch, delivery, and email routing will be recorded.
3. Offers are made in a digital format Any company, selling anything via the Internet, makes a public offer to its clients. In this case, the text of the offer is just published on the website. This text may be changed at any time. There are many cases that require confirmation of the offer content and the fact of publishing it on the website. Both the seller and the buyer may need it. You can use the SilentNotary website to certify the documents and the pages, where it was published. Just send a link to the page, and order a certification of the page content.
4. Website content copyrights Almost every website shows the users a © symbol. As a matter of fact, placement of the copyright protection symbol is a meaningless ritual. It is very hard to prove that some content was present on the website at some time in the past. Just certify the website content using SilentNotary if you need to protect your rights and fight against plagiarism. Just send a link to SilentNotary, and order a certification of the website pages and content. That will be enough. Afterwards, you can publish a link of the certified content, next to the notice of copyright protection.
5. Priority of authorship Code text, picture, story, music... Any intellectual property item, which can be represented in digital format, is subject to legal protection. SilentNotary cannot replace a patent solicitor, but it helps to prove precedence in the case of dispute. To certify the item, just send a file via email to the SilentNotary address, certify it by yourself on the website, or share it in a message to the chatbot.
6. Agreements You can record any negotiation and decision taken. Just conduct negotiations through the multi-chat feature in our chatbot. The chatbot will prepare and certify the conversation protocol on your command.
7. License agreement How many times has each of us agreed to the terms of use of some software program? That said, the text of the agreement is only a text on the website page, which can be replaced at any moment. If a user violates the terms of the agreement, it is hardly possible to prove which text was published at the moment the user agreed to it. Send a link of the page with the agreement to SilentNotary. We will record the fact of publication at a specified address, date of publication, and content of all the published documents.
8. Whitepaper and other types of public statements Oftentimes, to refer to someone’s statement, we should prove that this exact text that existed in the past, during a certain action was performed. For example, to participate in an ICO, you should record the whitepaper content and the fact of publishing it at the moment of the transaction. Just send a link of the published document to the SilentNotary website, and certify the fact of publication, date of publication, and document content.
9. User guides Financial success of a product manufacturer depends on the accuracy of the user guide and the fact of publishing it on the website. You can certify the page with the publication via the SilentNotary website by just sending a hyperlink to the page.
10. Evidence gathering from an accident site In case of an incident (for example, a car crash), an acute need for records of the circumstances of the incident often arises. Just launch the SilentNotary chatbot and send images and video files of the relevant circumstances.
11. Verbal agreements It is very hard to prove a verbal agreement in court. Do not risk it. During conclusion of the agreement, launch the SilentNotary chatbot and record your conversation. The audio file will be recorded and certified for you.

User Interfaces
As stated in the previous section, the user interacts with the service using the following interfaces: messengers, web, mobile apps, and email. The working schemes of these interfaces are

The capabilities of the chatbot are determined by the functionality that the messenger provides. In addition, during the development of the messenger, these opportunities may change. Our development plan involves working with all popular instant messengers.
For implementation in the demo version, the Telegram and Facebook messenger have been selected. At the launch time of the chatbot, the Facebook messenger did not support group chat. To solve this problem, we implemented a synthetic multi-chat, allowing the participation of an unlimited number of users and an unlimited number of simultaneously running multi- chats. Each of the users communicates only with the chatbot, the chatbot collects two-way communication in the common multi-chat. The user can now switch between simultaneous conversations.
The service allows the conversation’s participants to assure the protocol in the blockchain and store it in the SilentNotary Vault. Archives will be available to users in their own personal account.

The scheme of working with SilentNotary through the web is the following: The registered user drags (drag & drop feature) the file to the appropriate area on the SilentNotary website or places the link of the file to the webpage that he wants to certify.
When you save a file or page of a site, an archive is created with the content of the file or page, the hash value is calculated, user confirmation is requested, the service is paid, the hash of this archive is deployed into the decentralized ledger (f.e. Ethereum blockchain or ByteBall (DAG)-based graphchain), and the archive is saved in the vault. The archive with the hash and the transaction data is available for downloading in the user’s own personal account.

Mobile applications
The mobile apps for iOS & Android have been developed and are available now at AppStore and PlayMarket.
Functions planned and implemented:
• Personal and corporate account;
• Real-time video and audio recording capabilities;
• Access to the Notary Vault for all the uploaded and certified content;
• Real-time video recording using our innovative LightStamp Technology (in development);
• Secure mode (in development).
Secure mode.
While selling a product, we received requests from customers to develop a technology to certify extremely confidential information. Instead of using particularly robust cryptographic technologies, a simple solution was found.
For particularly sensitive data, the enhanced security mode will be used: hash will be calculated on the Client side and transferred to the system without transferring and storing data to NotaryVault. For certification, the system does not need to have the original data, only a digital fingerprint (hash) is enough. If necessary, the User will provide source files for the technical expertise.
This mode will be available only to users of mobile applications and when integrating corporate systems through API.

The scheme of working with SilentNotary via e-mail is the following: The user sends an email directly to our mailbot address ([email protected]) or adds the mailbot address in cc.
SilentNotary creates an archive with the email’s details, RFC-title, content, and attached documents. The hash of the archive is calculated, and then the user is required to confirm the saving by replying to a message.
After the document is saved and payment for the service is confirmed by the user, DApp SilentNotary records data hash in the distributed ledger (blockchain/graphchain).

The user then receives a link for the hash transactions. The archive is stored in the repository. (In the demo version, Google cloud storage is used, and in the main version, the possibility of using decentralized systems will be considered.) After the operation is completed, the user will be able to access the saved history in his/her personal account.

Technical description of the product.
The scheme of operation of the service is quite simple. In accordance with various interactions with the user, an archive is formed, including the date of the event, details of the document, and the document itself (it can be a file and a protocol of correspondence, among others).
Next, the hash of this archive is calculated by the algorithm SHA-256, with the help of a smart contract written into the distributed ledger (blockchain or grapgchain). The archive itself is saved in the cloud storage. The user receives a hash, which is the result of computing the hash function on the user’s archive. The TxHash of the transaction in the distributed ledger platform and a link to the document in his/her personal account are then made available.

Legal issues.
SilentNotary uses blockchain (graphchain) as a service. Dealing with any complex technical system, we need to use a special technical expertise to prove the authenticity of the created evidence. Thus we need to:
- develop a methodology for experts in different countries,
- explain how to use created evidences in a court,
- collect and generalize Juridical practices,
- certify lawyers and experts to use SilentNotary technology and
- create a marketplace for decentralized legal services.
These are prime functions of our SilentNotary foundation.

The principal legal scheme of SilentNotary product
1. The event is fixed with the user's device and recorded as a digital file.
2. The digital fingerprint (hash of the file) is calculated.
3. Hash is sent to a smart contract, which records it in the distributed ledger.
4. The record in the ledger, the hash of the file, and the file itself is used as evidence in the court.
5. An application is made for technical expertise to determine that the file hasn’t been changed (corresponds bit by bit to the one presented as evidence) at the specified time (at the time of recording in the distributed ledger). For this, the expert should determine that:
- It is not possible to create a file that is different from the one presented but with the same hash.
- It is not possible to change the presented record in the distributed ledger.
- The timestamp of presented record corresponds to the actual recording time with the required accuracy.

Multiplatform Concept.
We use a as a service to store our evidences immutable and timestamped. But distributed ledger technology is developing rapidly and we have a choice of platforms now with different features. Some of them more stable but more expensive, others are young but very fast and cheap. Some of them will lose their positions but new stars will arise. We are open for different platforms and provide our customers with a choice. Our customers can choose more suitable platform for their specific case.
For example, it is very expensive and almost impossible to use Ethereum to certify data flows from IoT devices now, but we can use such solutions as a DAG or PoS-based platforms in this case.

The principal scheme of Multiplatform Concept.
SilentNotary users can choose the platform used to store evidence. SilentNotary is an open system for the use of various platforms. The basic requirements for a decentralized distributed ledger are the unchanged records and the time synchronized between all nodes.
At present, Ethereum is used as the main platform. To ensure low-cost and fast transactions, for example to certify data flows from IoT devices, test integration with the DAG-based multiconsensual blockchain platform Ubix.Network was made.[1]