├── collection/  # Enhanced collections (LruHashMap, CaseInsensitiveMap)
├── concurrent/  # Concurrency utilities
├── convert/     # Type conversion (*ConversionUtil)
├── crypto/      # Cipher & encryption (CachedCipher)
├── exception/   # Runtime exception wrappers
├── io/          # I/O & resource utilities
├── jar/         # JAR file utilities
├── lang/        # Reflection & language utilities

- `@Secured` annotation with role array (`"admin-user"`, `"admin-user-view"`)
- Role-based query filtering via `RoleQueryHelper`
- Authentication: Local (UserService), LDAP, OIDC, SAML, SPNEGO, Entra ID
- Security features: AES encryption, SHA256 digest, LDAP injection prevention, password policy, rate limiting

## Naming Conventions

| Element | Convention | Example |
|---------|------------|---------|

        assertEquals(invertibleCryptographer, provider.providePrimaryInvertibleCryptographer());
        assertEquals(md5, provider.providePrimaryOneWayCryptographer());
    }

    // Test encryption and decryption functionality
    @Test
    public void test_invertibleCryptography() {
        // Test that invertible cryptography works correctly

  {
    "name": "ear",
    "path": "platforms/jvm/ear",
    "unitTests": true,
    "functionalTests": true,
    "crossVersionTests": false
  },
  {
    "name": "encryption-services",
    "path": "platforms/core-configuration/encryption-services",
    "unitTests": false,
    "functionalTests": false,
    "crossVersionTests": false
  },
  {
    "name": "enterprise",

            <option value="$PROJECT_DIR$/platforms/core-configuration/dependency-management-serialization-codecs" />
            <option value="$PROJECT_DIR$/platforms/core-configuration/encryption-services" />
            <option value="$PROJECT_DIR$/platforms/core-configuration/file-collections" />
            <option value="$PROJECT_DIR$/platforms/core-configuration/file-operations" />

search_engine.password=
# Interval (ms) for heartbeat checks to the search engine.
search_engine.heartbeat_interval=10000

# Cipher algorithm used for encryption.
app.cipher.algorithm=aes
# Secret key for encryption (change this value for production).
app.cipher.key=___change__me___
# Algorithm for digest calculation.
app.digest.algorithm=sha256
# Regex pattern for properties to encrypt.

  - `apiserver_authorization_config_controller_last_config_info` metric after successfully loading the authorization configuration file.
  - `apiserver_encryption_config_controller_last_config_info` metric after successfully loading the encryption configuration file. ([#132299](https://github.com/kubernetes/kubernetes/pull/132299), [@aramase](https://github.com/aramase)) [SIG API Machinery, Auth and Testing]

     * comment: Cipher algorithm used for encryption.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getAppCipherAlgorithm();

    /**
     * Get the value for the key 'app.cipher.key'. <br>
     * The value is, e.g. ___change__me___ <br>
     * comment: Secret key for encryption (change this value for production).