# Digital Identity - Main Concepts

> **In simple terms:** This page explains the key terms you'll encounter when using Digital Identity Verification. Think of it as learning the vocabulary: what's a validator, a validation, a flow, and a process? Once you understand these terms, everything else will make more sense.

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### What is a Validator?
 A **Validator** a is specialized entity utilized to authenticate the data provided by a user. This could be a sophisticated software, a complex algorithm, or an external authority that is specialized in validating specific types of information. Truora uses these validators to ensure data accuracy and user´s authenticity.

### What is a Validation?
A **Validation** is the essential action of using a **Validator** for a specific user. This process ensures that each user's identity matches their provided information, reinforcing the platform's security and trustworthiness. It's a key step that underscores Truora's commitment to maintaining a secure environment for all its users.

{{<img src="/images/illustrations/digital_identity/doc_validation.png" alt="doc_validation" width="55%">}}
<p align="center" style="font-family: 'Poppins', sans-serif; font-weight: bold;">Validator & Validation example</p>

### What is a Flow?
A **Flow** refers to a carefully ordered sequence of validators, which will be later used to carry out an identity verification process. Each validator within this sequence plays a key role in the authentication and verification of the user's data.

Your company is responsible for choosing validators within a flow. This decision is crucial, as each validator plays a specific role in the authentication process. Ensure the selection aligns perfectly with your business requirements.

{{<img src="/images/illustrations/digital_identity/flow_creation_simple.gif" alt="flow_creation" width="65%">}}
<p align="center" style="font-family: 'Poppins', sans-serif; font-weight: bold;">Choosing validators for your Flow</p>

**Keep in mind**: A Flow can be used by multiple users in their unique Processes.

### What is a Process?
A **Process** refers to the execution of a particular flow for a specific user. It involves guiding the user through the sequence of validators defined within the flow, each step contributing to the ultimate goal of verifying the user's identity. This user-specific and flow-guided operation is what Truora refers to as a **Process**.

**Keep in mind**: A single **Flow** can be used by multiple users in their respective **Processes**. Consequently, a Flow is often associated with multiple Processes, making it accessible to various **users**.

{{<img src="/images/illustrations/digital_identity/process_flow.gif" alt="process_flow_example" width="65%">}}
<p align="center" style="font-family: 'Poppins', sans-serif; font-weight: bold;">Process & Flow example</p>


## Main Transaction Identifiers

A **Transaction Identifier** is a unique value assigned to a specific entity or action within the Truora system, facilitating its identification, tracking, and access to related information. These identifiers include:

- **Flow ID**: The **flow_id** is a unique identifier for a **Flow** that you have created. 
- **Account ID**: The **account_id** is a unique value assigned to each **user** in the system to distinguish them and access the information and processes.
- **Validation ID:** The **validation_id** is the unique identifier for a performed validation.
- **Process ID**: The **process_id** is a unique identifier for a performed process.

### Identifiers Considerations ###
 - Since a **flow** can be used by multiple users, a single **flow_id** may be associated to multiple **process_id** and therefore to multiple **account_id**.
 - Since a **user** can perform multiple **validations**, then a single **account_id** may be associated to multiple **validation_id**.