HarmonyOS NEXT安全体系护航教育数据：AI赋能的权限管控与智能文件加密 原创

import ohos.security.permission.PermissionManager;
import ohos.security.permission.PermissionRequest;
import ohos.security.permission.PermissionType;

public class EducationPermissionManager {
    private static final String TAG = "EduPermission";
    private final Context context;
    
    public EducationPermissionManager(Context context) {
        this.context = context;
    }
    
    // AI辅助权限请求
    public void requestPermissionsForEducation(String[] perms) {
        PermissionManager permissionManager = new PermissionManager(context);
        
        // AI分析权限必要性
        String[] filteredPerms = AIPermissionAnalyzer.filterPermissions(context, perms);
        
        if (filteredPerms.length == 0) {
            Log.info(TAG, "无需申请权限");
            return;
        }
        
        // 创建权限请求
        PermissionRequest request = new PermissionRequest.Builder()
            .setPermissions(filteredPerms)
            .setReason("教育功能需要以下权限来提供完整服务")
            .setPermissionType(PermissionType.EDUCATION_APP) // 教育类应用特殊标识
            .build();
        
        // 请求权限
        permissionManager.requestPermissions(request, (grantedPermissions, deniedPermissions) -> {
            if (deniedPermissions.length > 0) {
                Log.warn(TAG, "以下权限被拒绝: " + Arrays.toString(deniedPermissions));
                // AI权限降级处理
                AIPermissionHandler.handleDeniedPermissions(deniedPermissions);
            }
        });
    }
    
    // 动态权限监控
    public void monitorPermissions() {
        // 注册权限使用监听器
        PermissionManager.addPermissionUsageObserver(new PermissionManager.PermissionUsageObserver() {
            @Override
            public void onPermissionUsed(String permissionName) {
                // AI分析权限使用行为
                PermissionUsageAnalysisResult result = 
                    AIPermissionMonitor.analyzePermissionUsage(context, permissionName);
                
                if (result.isSuspicious()) {
                    Log.error(TAG, "检测到异常权限使用: " + permissionName);
                    // AI主动防护措施
                    AISecurityProtector.applyProtection(permissionName);
                }
            }
        });
    }
}

public class AIPermissionAnalyzer {
    // 教育应用权限合规性模型
    private static final AIClassifier PERMISSION_CLASSIFIER = 
        AIClassifierManager.getClassifier("EDU_PERMISSION_MODEL");
    
    // 权限分类策略
    public static PermissionCategory classifyPermission(String permission) {
        // AI分类核心算法
        return PERMISSION_CLASSIFIER.classify(permission);
    }
    
    // 过滤过度申请的权限
    public static String[] filterPermissions(Context ctx, String[] requestedPermissions) {
        String packageName = ctx.getBundleName();
        List<String> filtered = new ArrayList<>();
        
        for (String perm : requestedPermissions) {
            PermissionCategory category = classifyPermission(perm);
            PermissionStatus status = getPermStatus(packageName, perm);
            
            // AI决策流程
            if (shouldGrantPermission(packageName, perm, category, status)) {
                filtered.add(perm);
            }
        }
        
        return filtered.toArray(new String[0]);
    }
    
    // AI权限授予策略
    private static boolean shouldGrantPermission(String packageName, String perm, 
                                               PermissionCategory category, 
                                               PermissionStatus status) {
        // 教育应用特殊规则
        if (category == PermissionCategory.LOCATION && 
            !AppInfo.get(ctx).isMapBasedApp()) {
            return false; // 非地图类教育APP禁止位置权限
        }
        
        // 高风险权限额外验证
        if (category == PermissionCategory.SENSITIVE) {
            return AIPermissionValidator.validateHighRisk(packageName, perm);
        }
        
        // 默认安全策略
        return AISecurityPolicyEngine.checkPermission(packageName, perm);
    }
}

import ohos.security.file.EncryptedFile;
import ohos.security.file.FileProtection;
import ohos.ai.file.FileSecurityManager;

public class EducationFileEncryptor {
    private static final String TAG = "EduEncryptor";
    
    // AI驱动的文件加密
    public void secureEducationFile(String filePath, String contentType) {
        // AI生成最适合的加密策略
        FileProtection protection = AIEncryptionStrategy.generateProtection(filePath, contentType);
        
        // 创建加密文件
        EncryptedFile encryptedFile = new EncryptedFile.Builder(filePath)
            .setProtectionType(protection.getType())
            .setEncryptionAlgorithm(protection.getAlgorithm())
            .setBiometricRequired(protection.requireBiometric())
            .build();
        
        // 自动应用加密
        try {
            FileSecurityManager.applyFileProtection(encryptedFile);
            Log.info(TAG, "文件加密成功: " + filePath);
            
            // AI加密元数据
            AIEncryptionRecorder.record(filePath, protection);
        } catch (SecurityException e) {
            Log.error(TAG, "文件加密失败", e);
            AISecurityNotifier.notifyEncryptionFailure(filePath);
        }
    }
    
    // 教育文件解密
    public InputStream decryptEducationFile(String filePath) {
        // AI增强的身份验证
        if (!AIUserVerifier.verifyDecryptionIntent()) {
            throw new SecurityException("AI检测到异常解密请求");
        }
        
        // 多因素认证
        if (EncryptedFile.getProtection(filePath).requireBiometric()) {
            BiometricAuth.authenticate("请验证身份解密教育文件");
        }
        
        return EncryptedFile.openDecryptedStream(filePath);
    }
    
    // 自动加密新创建的教育文件
    public void autoEncryptNewFiles() {
        // 注册文件创建监听
        FileObserver observer = new FileObserver("/education") {
            @Override
            public void onCreated(String path) {
                // AI内容分析决策
                if (AIContentAnalyzer.isSensitiveEducationFile(path)) {
                    secureEducationFile(path, getContentType(path));
                }
            }
        };
        observer.startWatching();
    }
}

public class AIEncryptionStrategy {
    // 教育文件加密模型
    private static final AIClassifier ENCRYPTION_MODEL = 
        AIClassifierManager.getClassifier("EDU_FILE_ENCRYPTION");
    
    // 生成最佳加密策略
    public static FileProtection generateProtection(String filePath, String contentType) {
        // 提取文件特征
        FileSecurityProfile profile = extractSecurityProfile(filePath);
        
        // AI决策矩阵
        ProtectionLevel level = determineProtectionLevel(profile);
        
        // 构建加密策略
        FileProtection protection = new FileProtection(level);
        
        // AI增强策略
        if (contentType.startsWith("student/record")) {
            protection.enableWatermarking(); // 学生档案加水印
            protection.enableBehaviorTrace(); // 启用操作追踪
        }
        
        // 高敏感数据额外保护
        if (profile.getSensitivityScore() > 8.0) {
            protection.requireBiometric(true); // 必须生物认证
            protection.setKeyRotationPolicy(KeyRotation.DAILY); // 每日轮换密钥
        }
        
        return protection;
    }
    
    // AI安全分级
    private static ProtectionLevel determineProtectionLevel(FileSecurityProfile profile) {
        double sensitivity = profile.getSensitivityScore();
        String fileType = profile.getFileType();
        
        // 教育数据特殊规则
        if ("exam_paper".equals(fileType)) {
            return ProtectionLevel.CONFIDENTIAL;
        }
        
        if ("student_grades".equals(fileType)) {
            return ProtectionLevel.SECRET;
        }
        
        // AI动态决策
        if (sensitivity > 7.0) {
            return ProtectionLevel.TOP_SECRET;
        } else if (sensitivity > 5.0) {
            return ProtectionLevel.CONFIDENTIAL;
        } else {
            return ProtectionLevel.RESTRICTED;
        }
    }
}

public class AIKeyManager {
    // AI密钥分段存储
    public void secureKeyDistribution(String keyId) {
        // 本地存储部分密钥
        String localPart = SecureStorage.saveKeySegment(keyId, getLocalSegment());
        
        // 可信设备存储
        distributeToTrustedDevices(keyId);
        
        // 云密钥管理服务
        CloudKeyVault.storeKeySegment(keyId, getCloudSegment());
        
        // AI密钥完整性验证
        AIKeyIntegrityMonitor.monitorKey(keyId);
    }
    
    // 生物特征绑定密钥
    public void bindKeyToBiometric(String keyId) {
        BiometricFeature feature = BiometricAuth.getUserFeatures();
        KeyBinding binding = new KeyBinding(keyId, feature);
        
        // AI风险检测
        if (!AIKeyRiskAnalyzer.isSafeBinding(binding)) {
            throw new SecurityException("AI检测到异常绑定请求");
        }
        
        KeyBindingManager.registerBinding(binding);
    }
    
    // AI动态密钥轮换
    public void rotateKeysIfNeeded() {
        List<String> keysToRotate = AIKeyRotationManager.getKeysForRotation();
        for (String keyId : keysToRotate) {
            // 安全密钥更新
            updateKeyMaterial(keyId);
            
            // 重新加密关联文件
            AIReEncryptor.reEncryptFilesForKey(keyId);
        }
    }
}

// 安全浏览器组件
@Component
struct SecureEducationViewer {
    @State fileUrl: string = '';
    @State encrypted: boolean = false;
    @State protectionLevel: string = '标准';
    @State watermarkText: string = '';
    
    build() {
        Column() {
            // 安全状态栏
            Text(`安全级别: ${this.protectionLevel} | ${this.encrypted ? '已加密' : '未加密'}`)
                .fontColor('#ff0000')
                .margin({ top: 10 })
            
            // 水印视图
            Stack() {
                WebView({ src: this.fileUrl })
                
                // AI动态水印
                WatermarkComponent({ text: this.watermarkText })
            }
            
            // 安全操作栏
            Row() {
                Button('打印').onClick(() => this.requestPrint())
                Button('分享').onClick(() => this.secureSharing())
                Button('批注').onClick(() => this.authenticateAnnotation())
            }
        }
    }
    
    // 文件加载完成回调
    onPageFinished(url: string) {
        // AI分析文件安全状态
        this.encrypted = AISecureBrowser.isEncrypted(url);
        this.protectionLevel = AISecureBrowser.getProtectionLevel(url);
        
        // 动态生成用户水印
        this.watermarkText = WatermarkGenerator.generateUserWatermark();
    }
    
    // 安全打印请求
    requestPrint() {
        // AI打印控制
        if (!AIPrintManager.authorizePrint(this.fileUrl)) {
            showToast("AI检测到敏感文档禁止打印");
            return;
        }
        
        // 安全打印流程
        AISecurePrint.printDocument(this.fileUrl, this.watermarkText);
    }
    
    // 教育文档安全分享
    secureSharing() {
        // AI合规检查
        AISharingPolicy.checkSharingCompliance(this.fileUrl);
        
        // 加密副本创建
        String protectedCopy = FileEncryptor.createProtectedCopy(this.fileUrl);
        
        // 受控分享
        SecureShare.distribute([protectedCopy], 'EDU_DOCUMENT');
    }
}

public class AISecurityMonitor {
    // 教育安全威胁模型
    private static final AIModel SECURITY_MODEL = AIModelManager.load("EDU_SECURITY_MODEL");
    
    // 安全事件收集
    public static void monitorSecurityEvents() {
        SecurityEventCenter.registerListener(new SecurityEventCollector());
    }
    
    // 实时威胁分析
    private static class SecurityEventCollector implements SecurityListener {
        @Override
        public void onSecurityEvent(SecurityEvent event) {
            // 提取事件特征
            double[] features = extractEventFeatures(event);
            
            // AI威胁评分
            double threatScore = SECURITY_MODEL.predict(features);
            
            // 动态响应机制
            if (threatScore > 8.5) {
                handleCriticalThreat(event);
            } else if (threatScore > 6.0) {
                handlePotentialThreat(event);
            }
            
            // 安全事件学习
            AISecurityLearner.addEventToTraining(event, threatScore);
        }
        
        // 关键威胁处理
        private void handleCriticalThreat(SecurityEvent event) {
            // 隔离受影响区域
            ContainmentPolicy.containThreat(event);
            
            // 通知安全管理员
            SecurityNotifier.alertAdmins(event);
            
            // 学生隐私保护
            if (event.involvesStudentData()) {
                StudentPrivacyProtector.activateShield();
            }
            
            // AI取证分析
            AIForensics.captureEvidence(event);
        }
    }
    
    // 自适应安全模型更新
    public static void updateSecurityModel() {
        // 加载新事件数据
        TrainingDataSet data = AISecurityLearner.getLatestData();
        
        // 再训练安全模型
        AIModel newModel = AIModelTrainer.retrain(SECURITY_MODEL, data);
        
        // 无缝切换
        AIModelManager.update("EDU_SECURITY_MODEL", newModel);
    }
}

// 教育数据区块链存证
BlockchainRecorder.recordStudentAchievement(record);

// AI驱动的审计分析
AIEducationAuditor.verifyDataIntegrity();

// 量子加密通道
QuantumChannel.createSecureLink(device1, device2);

// AI优化密钥分发
AIKeyDistributor.optimizeQuantumKeys();

// 隔离执行敏感操作
TrustedExecutionEnvironment.executeSecureTask(() -> {
    processExamResults();
});

// AI增强的TEE保护
AITeeGuardian.monitorExecution();

// 联邦学习框架
FederationLearningManager.startSession();

// 学生数据隐私保护
AIFederatedPrivacy.applyProtection();