# Data Retention, Classification & Compliance

Data retention, classification, and compliance are **key components of SecureCart's data governance strategy**. They ensure that **data is stored securely, classified correctly, and retained only as long as necessary** to meet legal, regulatory, and operational requirements.

✔ **Why is Data Retention, Classification & Compliance important for SecureCart?**

* **Prevents unauthorized access to sensitive customer data.**
* **Ensures compliance with industry regulations** (PCI DSS, GDPR, HIPAA).
* **Optimizes storage costs by managing data lifecycles effectively.**
* **Reduces risk of legal penalties by implementing proper data governance policies.**

***

### **🔹 Step 1: Understanding Data Classification**

Data classification helps **categorize data based on sensitivity and importance** to enforce appropriate security controls. SecureCart uses **Amazon Macie** and **AWS Tags** to classify data automatically.

#### **A. Data Classification Levels**

| **Classification Level**  | **Description**                                          | **Example Data in SecureCart**                   |
| ------------------------- | -------------------------------------------------------- | ------------------------------------------------ |
| **Public Data**           | Data that can be accessed by anyone.                     | Product descriptions, FAQs.                      |
| **Internal Data**         | Used within SecureCart but not exposed to customers.     | System logs, application performance metrics.    |
| **Confidential Data**     | Restricted access, requires encryption.                  | Customer contact details, transaction history.   |
| **Highly Sensitive Data** | Critical data requiring **strongest security controls**. | Credit card details, payment processing records. |

✅ **Best Practices:**\
✔ **Classify data automatically** using Amazon Macie.\
✔ **Tag sensitive data with AWS Resource Tags** for security and compliance tracking.\
✔ **Apply appropriate access controls** based on data classification.

***

### **🔹 Step 2: Implementing Data Retention Policies**

✔ **Why?** – Data retention ensures that SecureCart keeps **data only as long as necessary** while optimizing costs.

| **Data Type**       | **Retention Policy**                         | **Storage Class**                 |
| ------------------- | -------------------------------------------- | --------------------------------- |
| **Order Logs**      | Archive after 30 days, delete after 1 year.  | Amazon S3 Glacier.                |
| **Customer Data**   | Delete after 5 years (GDPR Compliance).      | Amazon RDS with backup retention. |
| **Security Logs**   | Retain for 1 year for auditing.              | Amazon S3 Standard-IA.            |
| **Billing Records** | Retain for 7 years for financial compliance. | Amazon S3 Intelligent-Tiering.    |

#### **A. Automating Data Retention with AWS Services**

SecureCart uses **AWS S3 Lifecycle Policies, RDS backup retention, and DynamoDB TTL (Time-to-Live)** to automate data retention.

| **AWS Service**                 | **Retention Strategy**                                                |
| ------------------------------- | --------------------------------------------------------------------- |
| **Amazon S3 Lifecycle Rules**   | Moves logs to Glacier after 30 days, deletes after 1 year.            |
| **Amazon RDS Backup Retention** | Keeps automated backups for **7 days**, long-term backups in Glacier. |
| **DynamoDB TTL**                | Automatically deletes expired session data.                           |

✅ **Best Practices:**\
✔ **Use S3 Lifecycle Policies** to automatically transition old data to low-cost storage.\
✔ **Apply DynamoDB TTL for temporary session data** to free up storage.\
✔ **Ensure compliance with GDPR & PCI DSS by defining clear data retention policies.**

***

### **🔹 Step 3: Ensuring Data Compliance with AWS Governance Services**

SecureCart follows **legal and regulatory compliance frameworks** by implementing AWS governance tools.

| **Regulatory Compliance**         | **Requirement**                          | **AWS Service Used**                     |
| --------------------------------- | ---------------------------------------- | ---------------------------------------- |
| **PCI DSS (Payment Security)**    | Encrypt payment transactions.            | AWS KMS, Amazon RDS Encryption.          |
| **GDPR (Data Privacy)**           | Retain customer data for a limited time. | Amazon S3 Lifecycle Policies, AWS Macie. |
| **HIPAA (Healthcare Compliance)** | Securely store medical-related records.  | AWS Config, IAM Policies.                |
| **SOC 2 (Operational Security)**  | Monitor access logs for security events. | AWS CloudTrail, GuardDuty.               |

#### **A. Automating Compliance Audits with AWS Services**

✔ **AWS Config** – Continuously checks whether data storage complies with SecureCart’s policies.\
✔ **AWS Security Hub** – Aggregates security findings across all AWS accounts.\
✔ **AWS CloudTrail** – Logs all API activity for audit purposes.

✅ **Best Practices:**\
✔ **Enable AWS Config Rules** to detect misconfigured data retention settings.\
✔ **Use AWS Security Hub to consolidate security and compliance alerts.**\
✔ **Regularly audit CloudTrail logs for suspicious access patterns.**

***

### **🔹 Step 4: Implementing Secure Data Deletion & Compliance Management**

✔ **Why?** – Ensures that **data is securely deleted when retention periods expire** while maintaining compliance.

| **Secure Deletion Method**      | **Use Case in SecureCart**                         |
| ------------------------------- | -------------------------------------------------- |
| **Amazon S3 Object Expiration** | Automatically deletes old logs & temporary files.  |
| **AWS KMS Key Deletion**        | Removes encryption keys for data no longer needed. |
| **RDS Snapshot Expiration**     | Deletes old database backups automatically.        |

✅ **Best Practices:**\
✔ **Configure S3 Expiration Policies** to prevent unnecessary data storage.\
✔ **Use AWS Key Deletion for permanent data disposal.**\
✔ **Implement IAM controls to restrict who can delete sensitive data.**

***

### **🔹 Step 5: Continuous Monitoring & Auditing for Compliance**

✔ **Why?** – Ensures SecureCart **meets compliance requirements and detects violations** in real-time.

| **Monitoring Service** | **Purpose**                            | **Use Case in SecureCart**                                       |
| ---------------------- | -------------------------------------- | ---------------------------------------------------------------- |
| **AWS CloudTrail**     | Tracks API access & changes.           | Detects unauthorized attempts to modify data retention settings. |
| **Amazon Macie**       | Scans for sensitive data exposure.     | Identifies unencrypted credit card data in S3.                   |
| **AWS Config**         | Checks compliance of storage settings. | Alerts if an S3 bucket is misconfigured for public access.       |
| **AWS Security Hub**   | Centralized compliance monitoring.     | Tracks GDPR & PCI DSS violations.                                |

✅ **Best Practices:**\
✔ **Enable CloudTrail to track all API and data access actions.**\
✔ **Use AWS Config to automatically enforce compliance rules.**\
✔ **Monitor sensitive data with Amazon Macie.**

***

## **🚀 Summary**

✔ **Classify all data using Amazon Macie and enforce IAM-based controls.**\
✔ **Apply retention policies using S3 Lifecycle, RDS backups, and DynamoDB TTL.**\
✔ **Follow GDPR, PCI DSS, and HIPAA compliance requirements using AWS governance tools.**\
✔ **Implement secure data deletion with KMS key expiration and object lifecycle policies.**\
✔ **Monitor compliance with AWS CloudTrail, Security Hub, and Config Rules.**

#### **Scenario:**

SecureCart’s security team must **identify and classify sensitive data** while enforcing **data retention policies**.

#### **Key Learning Objectives:**

✅ Identify **sensitive data using Amazon Macie**\
✅ Use **AWS Config & Security Hub to monitor compliance**\
✅ Enforce **data retention policies using IAM and lifecycle rules**\
✅ Align **AWS technologies to meet compliance requirements**

#### **Hands-on Labs:**

1️⃣ **Enable Amazon Macie to Detect Sensitive Data in S3**\
2️⃣ **Use AWS Config Rules to Enforce Data Governance Policies**\
3️⃣ **Implement Data Retention Policies for Compliance**

🔹 **Outcome:** SecureCart ensures **data classification and compliance alignment**.