Java Meets Queryable Encryption: Developing a Secure Bank Account Application

It looks like the code snippet you provided is incomplete and cut off at the end. However, I can help summarize what this Java configuration class does for setting up encrypted collections in MongoDB using Spring Boot or a similar framework.

Summary of EncryptionFieldConfig Class

The EncryptionFieldConfig class serves as a utility to configure encryption settings for MongoDB fields and create an encrypted collection if it doesn't already exist. Here's a breakdown of the key parts:

1. Configuration Properties:

   • The class uses properties like encryptedDatabaseName, encryptedCollectionName, etc., which are typically defined in application configuration files (e.g., application.properties or application.yml).

2. Customer Key Management:

   • It manages a customer master key stored locally as a file (CUSTOMER_KEY_PATH). This key is used to encrypt other keys and data.
   • If the customer master key file doesn't exist, it generates one with a specified size (KEY_SIZE).

3. KMS Provider Configuration:

   • Configures a local KMS provider for encryption operations.

4. Mongo Client Settings:

   • Builds MongoClientSettings and AutoEncryptionSettings to enable

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