中国联通与中国电信5G基站数据传输与安全鉴权技术

根密钥K (USIM/UDM共享)
    ↓ 派生（含服务网络名称绑定）
K_AUSF（归属网络锚点密钥）
    ↓ 派生
K_SEAF（服务网络锚点密钥）
    ↓ 派生
K_AMF（接入和移动性管理密钥）
    ↓ 派生
K_gNB（基站与UE间根密钥）
    ├── K_rrcenc（RRC信令加密）
    ├── K_rrcint（RRC信令完整性保护）
    ├── K_upenc（用户面数据加密）
    └── K_upint（用户面数据完整性保护）

电信密钥上下文：K_AUSF_CT → K_SEAF_CT → K_AMF_CT → K_gNB_CT
联通密钥上下文：K_AUSF_CU → K_SEAF_CU → K_AMF_CU → K_gNB_CU

CK'/IK' → EMSK → K_AUSF → K_SEAF → K_AMF → K_gNB

根密钥K → K_AUSF → K_SEAF → K_AMF → K_gNB → 会话密钥

class AKA_AuthModule {
private:
    std::string sn_name;          // 服务网络名称 (5G:mncXXX.mccXXX.3gppnetwork.org)
    CryptoEngine crypto_engine;    // 密码学引擎 (支持MILENAGE算法)
    KeyHierarchy key_hierarchy;    // 密钥层次管理器
    AuthContext auth_ctx;          // 认证上下文 (双运营商支持)
    
public:
    bool initiateAKA(const std::string& suci_or_supi);
    bool processAuthenticationRequest(const AuthVector& av);
    bool validateUSIMResponse(const std::string& res_star);
    KeySet deriveSessionKeys();
};

struct AuthVector {
    std::vector<uint8_t> rand;     // 128位随机挑战
    std::vector<uint8_t> autn;     // 认证令牌 (SQN⊕AK || AMF || MAC)
    std::vector<uint8_t> xres_star;// 预期响应 (256位)
    std::vector<uint8_t> k_ausf;   // 根密钥
    
    // 5G特定字段
    bool amf_separation_bit;       // AMF分离位 (必须为1)
    std::string snn;              // 服务网络名称
};

struct AUTN_Components {
    std::vector<uint8_t> sqn_ak;  // SQN ⊕ AK (6字节)
    std::vector<uint8_t> amf;     // AMF字段 (2字节)
    std::vector<uint8_t> mac;     // 消息认证码 (8字节)
};

class AUTNProcessor {
public:
    AUTN_Components parseAUTN(const std::vector<uint8_t>& autn) {
        AUTN_Components components;
        if (autn.size() != 16) throw std::invalid_argument("Invalid AUTN length");
        
        // 解析AUTN结构: SQN⊕AK(6) || AMF(2) || MAC(8)
        components.sqn_ak.assign(autn.begin(), autn.begin() + 6);
        components.amf.assign(autn.begin() + 6, autn.begin() + 8);
        components.mac.assign(autn.begin() + 8, autn.end());
        
        return components;
    }
    
    bool validateAMF(const std::vector<uint8_t>& amf) {
        // 验证AMF分离位是否为1 (5G要求)
        return (amf[1] & 0x80) != 0;  // 检查最高位
    }
    
    std::vector<uint8_t> computeXMAC(const std::vector<uint8_t>& k, 
                                   const std::vector<uint8_t>& rand,
                                   const AUTN_Components& autn) {
        // 实现MILENAGE f1算法计算XMAC
        MilenageAlgorithm milenage;
        return milenage.f1(k, rand, autn.sqn_ak, autn.amf);
    }
};

class KeyHierarchy {
private:
    std::vector<uint8_t> k_ausf;   // 根密钥
    std::vector<uint8_t> k_seaf;   // 安全锚点密钥
    std::vector<uint8_t> k_amf;    // AMF层级密钥
    std::vector<uint8_t> k_gnb;    // gNB层级密钥
    
public:
    void deriveK_SEAF(const std::vector<uint8_t>& k_ausf, const std::string& sn_name) {
        // K_SEAF = KDF(K_AUSF, SSN_Key || SNN)
        KDFParameters params;
        params.addKey(k_ausf);
        params.addString("ssn_key");
        params.addString(sn_name);
        
        k_seaf = crypto_kdf(params, 256);  // 256位输出
    }
    
    void deriveK_AMF(const std::vector<uint8_t>& k_seaf, const std::string& abba_param) {
        // K_AMF = KDF(K_SEAF, ABBA)
        KDFParameters params;
        params.addKey(k_seaf);
        params.addString(abba_param);
        
        k_amf = crypto_kdf(params, 256);
    }
    
    SessionKeySet deriveSessionKeys(const std::vector<uint8_t>& k_gnb, uint32_t pci, uint32_t arfcn) {
        SessionKeySet keys;
        
        // 派生RRC和用户面密钥
        keys.k_rrc_enc = deriveKey(k_gnb, "rrc_enc", pci, arfcn);
        keys.k_rrc_int = deriveKey(k_gnb, "rrc_int", pci, arfcn);
        keys.k_up_enc = deriveKey(k_gnb, "up_enc", pci, arfcn);
        keys.k_up_int = deriveKey(k_gnb, "up_int", pci, arfcn);
        
        return keys;
    }
    
private:
    std::vector<uint8_t> deriveKey(const std::vector<uint8_t>& base_key, 
                                 const std::string& purpose,
                                 uint32_t pci, uint32_t arfcn) {
        KDFParameters params;
        params.addKey(base_key);
        params.addString(purpose);
        params.addInt(pci);
        params.addInt(arfcn);
        
        return crypto_kdf(params, 128);  // 128位会话密钥
    }
};

class AKA_FlowController {
public:
    AuthResult executeAKAFlow(const AuthRequest& request) {
        AuthResult result;
        
        // 1. 接收并验证认证向量
        if (!validateAuthVector(request.auth_vector)) {
            result.status = AuthStatus::AV_VALIDATION_FAILED;
            return result;
        }
        
        // 2. 向UE发送认证挑战
        if (!sendAuthChallenge(request.auth_vector.rand, 
                              request.auth_vector.autn)) {
            result.status = AuthStatus::CHALLENGE_SEND_FAILED;
            return result;
        }
        
        // 3. 验证UE响应
        if (!validateUEResponse(request.ue_response, 
                               request.auth_vector.xres_star)) {
            result.status = AuthStatus::UE_RESPONSE_INVALID;
            return result;
        }
        
        // 4. 派生完整密钥体系
        result.key_set = deriveCompleteKeyHierarchy(request.auth_vector.k_ausf);
        result.status = AuthStatus::SUCCESS;
        
        return result;
    }
    
private:
    bool validateAuthVector(const AuthVector& av) {
        AUTNProcessor processor;
        auto autn_components = processor.parseAUTN(av.autn);
        
        // 验证AMF分离位
        if (!processor.validateAMF(autn_components.amf)) {
            logger.error("AMF separation bit validation failed");
            return false;
        }
        
        // 验证MAC完整性 (简化示例)
        auto computed_mac = processor.computeXMAC(av.k_ausf, av.rand, autn_components);
        if (computed_mac != autn_components.mac) {
            logger.error("AUTN MAC validation failed");
            return false;
        }
        
        return true;
    }
    
    bool validateUEResponse(const std::vector<uint8_t>& res_star,
                          const std::vector<uint8_t>& xres_star) {
        // 服务网络级验证 (HXRES* vs HRES*)
        auto hres_star = crypto_sha256(res_star);
        auto hxres_star = crypto_sha256(xres_star);
        
        return hres_star == hxres_star;
    }
    
    CompleteKeySet deriveCompleteKeyHierarchy(const std::vector<uint8_t>& k_ausf) {
        KeyHierarchy hierarchy;
        
        // 派生各级密钥
        hierarchy.deriveK_SEAF(k_ausf, sn_name_);
        hierarchy.deriveK_AMF(hierarchy.getK_SEAF(), abba_parameter_);
        
        // 生成NH密钥用于前向安全
        auto nh_key = generateNHKey();
        hierarchy.deriveK_gNB(hierarchy.getK_AMF(), nh_key, pci_, arfcn_);
        
        return hierarchy.deriveSessionKeys(hierarchy.getK_gNB(), pci_, arfcn_);
    }
};

class AsyncAKAProcessor {
private:
    ThreadPool thread_pool_;
    DSPAccelerator crypto_accelerator_;
    
public:
    std::future<AuthResult> processAKAAsync(const AuthRequest& request) {
        return thread_pool_.enqueue([this, request]() {
            // 使用DSP加速密码学计算
            crypto_accelerator_.setActive(true);
            
            auto result = aka_flow_controller_.executeAKAFlow(request);
            
            crypto_accelerator_.setActive(false);
            return result;
        });
    }
};

class ExceptionHandler {
public:
    void handleSyncFailure(const SyncFailureInfo& failure) {
        logger.warn("SQN synchronization failure detected");
        
        // 执行重同步流程
        if (initiateResynchronization(failure.auts)) {
            logger.info("Resynchronization completed successfully");
        } else {
            logger.error("Resynchronization failed, triggering fallback");
            triggerAuthFallback();
        }
    }
    
    void handleKeyUpdateFailure(const KeyUpdateError& error) {
        // 安全回退到上一组有效密钥
        security_context_.revertToPreviousKeys();
        logger.error("Key update failed, reverted to previous key set");
        
        // 报告安全事件
        security_monitor_.reportKeyUpdateFailure(error);
    }
};

class SecurityEnhancements {
public:
    std::string processSUCI(const std::string& suci) {
        // 实现ECIES解密获取SUPI
        ECIESDecryptor decryptor(public_key_);
        return decryptor.decrypt(suci);
    }
    
    bool validateSQN(const std::vector<uint8_t>& received_sqn) {
        // SQN验证防止重放攻击
        auto expected_range = calculateSQNRange();
        return isInRange(received_sqn, expected_range);
    }
    
    void enableAntiReplayProtection() {
        // 实现基于时间窗口的重放保护
        replay_cache_.enableTimeWindow(5);  // 5分钟时间窗口
    }
};

#include <vector>
#include <string>
#include <array>
#include <memory>
#include <openssl/hmac.h>
#include <openssl/sha.h>

// EAP-AKA'协议常量定义
constexpr size_t RAND_LENGTH = 16;      // 随机数长度
constexpr size_t AUTN_LENGTH = 16;      // 认证令牌长度
constexpr size_t RES_LENGTH = 8;        // 响应长度
constexpr size_t KEY_LENGTH = 32;       // 密钥长度（256位）

class EAPAKAProtocol {
private:
    std::array<uint8_t, RAND_LENGTH> rand_;           // 随机挑战值
    std::array<uint8_t, AUTN_LENGTH> autn_;          // 认证令牌
    std::array<uint8_t, RES_LENGTH> xres_;            // 预期响应
    std::array<uint8_t, KEY_LENGTH> ck_prime_;        // 转换后加密密钥
    std::array<uint8_t, KEY_LENGTH> ik_prime_;        // 转换后完整性密钥
    std::string serving_network_name_;                // 服务网络名称
    
public:
    // 构造函数：初始化认证向量
    EAPAKAProtocol(const std::array<uint8_t, RAND_LENGTH>& rand,
                   const std::array<uint8_t, AUTN_LENGTH>& autn,
                   const std::array<uint8_t, RES_LENGTH>& xres,
                   const std::string& snn);
    
    // 生成EAP-AKA'挑战消息
    std::vector<uint8_t> generateChallengeMessage();
    
    // 验证UE响应
    bool verifyUEResponse(const std::array<uint8_t, RES_LENGTH>& res,
                         const std::array<uint8_t, KEY_LENGTH>& mac);
    
    // 密钥派生函数（基于RFC 5448和3GPP TS 33.501）
    std::array<uint8_t, KEY_LENGTH> deriveKAUSF();
    std::array<uint8_t, KEY_LENGTH> deriveKSEAF();
    
    // 服务网络名称绑定验证
    bool validateSNNBinding(const std::string& requested_snn);
};

class MilenageAlgorithm {
private:
    std::array<uint8_t, 16> opc_;        // 运营商代码
    std::array<uint8_t, 16> k_;          // 主密钥
    
public:
    MilenageAlgorithm(const std::array<uint8_t, 16>& opc, 
                      const std::array<uint8_t, 16>& k);
    
    // AUTN验证函数
    bool verifyAUTN(const std::array<uint8_t, AUTN_LENGTH>& autn,
                    const std::array<uint8_t, RAND_LENGTH>& rand,
                    uint64_t& sqn);
    
    // RES计算函数
    std::array<uint8_t, RES_LENGTH> computeRES(
        const std::array<uint8_t, RAND_LENGTH>& rand);
    
    // CK'和IK'转换函数（5G增强）
    void computeCKPrimeIKPrime(const std::array<uint8_t, RAND_LENGTH>& rand,
                               const std::string& snn,
                               std::array<uint8_t, KEY_LENGTH>& ck_prime,
                               std::array<uint8_t, KEY_LENGTH>& ik_prime);
};

class KeyHierarchyDerivation {
public:
    // KDF函数实现（基于HMAC-SHA-256）
    static std::array<uint8_t, KEY_LENGTH> kdf(
        const std::array<uint8_t, KEY_LENGTH>& key,
        const std::string& label,
        const std::string& context);
    
    // KAUSF派生：CK'∥IK' → EMSK → KAUSF
    static std::array<uint8_t, KEY_LENGTH> deriveKAUSF(
        const std::array<uint8_t, KEY_LENGTH>& ck_prime,
        const std::array<uint8_t, KEY_LENGTH>& ik_prime);
    
    // KSEAF派生：KAUSF + SNN绑定
    static std::array<uint8_t, KEY_LENGTH> deriveKSEAF(
        const std::array<uint8_t, KEY_LENGTH>& k_ausf,
        const std::string& snn);
    
    // KAMF派生：KSEAF + ABBA参数
    static std::array<uint8_t, KEY_LENGTH> deriveKAMF(
        const std::array<uint8_t, KEY_LENGTH>& k_seaf,
        const std::array<uint8_t, 2>& abba);
};

class EAPAKAMessageCodec {
public:
    // EAP消息类型定义
    enum class EAPType : uint8_t {
        EAP_REQUEST = 1,
        EAP_RESPONSE = 2,
        EAP_SUCCESS = 3,
        EAP_FAILURE = 4
    };
    
    // AKA'子类型定义
    enum class AKASubtype : uint8_t {
        AKA_CHALLENGE = 1,
        AKA_AUTHENTICATION_REJECT = 2,
        AKA_SYNCHRONIZATION_FAILURE = 4
    };
    
    // EAP-AKA'属性类型
    enum class ATType : uint8_t {
        AT_RAND = 1,
        AT_AUTN = 2,
        AT_RES = 3,
        AT_AUTS = 4,
        AT_KDF = 23,
        AT_KDF_INPUT = 24,
        AT_MAC = 25
    };
    
    // 编码EAP-AKA'挑战消息
    static std::vector<uint8_t> encodeChallengeMessage(
        const std::array<uint8_t, RAND_LENGTH>& rand,
        const std::array<uint8_t, AUTN_LENGTH>& autn,
        const std::string& snn,
        const std::array<uint8_t, KEY_LENGTH>& mac_key);
    
    // 解码EAP-AKA'响应消息
    static bool decodeResponseMessage(const std::vector<uint8_t>& message,
                                     std::array<uint8_t, RES_LENGTH>& res,
                                     std::array<uint8_t, KEY_LENGTH>& mac);
    
    // 计算消息认证码（MAC）
    static std::array<uint8_t, KEY_LENGTH> computeMAC(
        const std::vector<uint8_t>& message,
        const std::array<uint8_t, KEY_LENGTH>& ik_prime);
};

class EAPAKAStateMachine {
private:
    enum class State {
        INITIAL,
        CHALLENGE_SENT,
        RESPONSE_RECEIVED,
        AUTHENTICATED,
        FAILED
    };
    
    State current_state_;
    std::unique_ptr<EAPAKAProtocol> protocol_;
    std::unique_ptr<MilenageAlgorithm> milenage_;
    
public:
    EAPAKAStateMachine(const std::string& snn);
    
    // 处理认证请求（AUSF侧）
    AuthenticationResult processAuthenticationRequest(
        const std::string& suci_or_guti,
        const std::string& requested_snn);
    
    // 生成挑战消息
    std::vector<uint8_t> generateAKAChallenge();
    
    // 处理UE响应
    AuthenticationResult processUEResponse(
        const std::vector<uint8_t>& response_message);
    
    // 异常处理：同步失败
    std::vector<uint8_t> handleSynchronizationFailure(
        const std::array<uint8_t, AUTN_LENGTH>& auts);
};

class MultiOperatorContextManager {
private:
    std::unordered_map<std::string, std::unique_ptr<EAPAKAProtocol>> contexts_;
    
public:
    // 添加上下文（电信/联通）
    void addContext(const std::string& operator_id,
                   std::unique_ptr<EAPAKAProtocol> context);
    
    // 根据SNN获取对应运营商上下文
    EAPAKAProtocol* getContextBySNN(const std::string& snn);
    
    // 快速恢复上下文（RRC INACTIVE状态）
    EAPAKAProtocol* resumeContext(const std::string& resume_id);
    
    // 清理过期上下文
    void cleanupExpiredContexts();
};

class CryptoAccelerator {
public:
    // 批量HMAC-SHA-256计算（DSP优化）
    static void batchHMACSHA256(
        const std::vector<std::array<uint8_t, KEY_LENGTH>>& keys,
        const std::vector<std::vector<uint8_t>>& messages,
        std::vector<std::array<uint8_t, 32>>& results);
    
    // 并行密钥派生
    static void parallelKeyDerivation(
        const std::vector<std::array<uint8_t, KEY_LENGTH>>& input_keys,
        const std::vector<std::string>& contexts,
        std::vector<std::array<uint8_t, KEY_LENGTH>>& output_keys);
};

class ReplayProtection {
private:
    std::unordered_set<uint64_t> used_rands_;
    uint64_t current_sqn_;
    
public:
    // 验证RAND唯一性
    bool validateRAND(const std::array<uint8_t, RAND_LENGTH>& rand);
    
    // SQN时间窗口验证
    bool validateSQN(uint64_t received_sqn);
    
    // 清理过期记录
    void cleanupExpiredRecords();
};

// 中国电信EAP-AKA'鉴权流程示例
int main() {
    // 初始化服务网络名称（中国电信格式）
    std::string ct_snn = "5G:mnc000.mcc460.3gppnetwork.org";
    
    // 创建EAP-AKA'协议实例
    auto eap_aka = std::make_unique<EAPAKAProtocol>(rand, autn, xres, ct_snn);
    
    // 生成挑战消息
    auto challenge_msg = eap_aka->generateChallengeMessage();
    
    // 模拟UE响应处理
    if (eap_aka->verifyUEResponse(ue_res, ue_mac)) {
        // 认证成功，派生密钥
        auto k_ausf = eap_aka->deriveKAUSF();
        auto k_seaf = eap_aka->deriveKSEAF();
        
        // 发送EAP-Success
        sendEAPSuccess(k_seaf);
    }
    
    return 0;
}

class DataSecurityModule {
private:
    SessionKeySet current_keys_;  // 当前使用的会话密钥{K_upenc, K_upint}
    uint32_t pdcp_count_;        // PDCP层COUNT值(与MAC层HARQ同步)
    CryptoEngine crypto_engine_;  // 加解密引擎
    
public:
    // 密钥上下文切换(共建共享场景)
    bool switchSecurityContext(const std::string& sn_name) {
        auto context = MultiOperatorContextManager::getContextBySNN(sn_name);
        if (!context.isValid()) {
            return false;
        }
        
        // 从AKA/EAP-AKA模块获取的用户面密钥
        current_keys_ = KeyHierarchy::deriveSessionKeys(
            context.getKgnb(), 
            context.getPCI(), 
            context.getARFCN()
        );
        
        // 重置COUNT同步状态
        pdcp_count_ = getCurrentCountFromMAC();
        return true;
    }
};

class CryptoEngine {
public:
    enum class Algorithm {
        AES_256_GCM,      // x86服务器环境(AES-NI优化)
        CHACHA20_POLY1305 // ARM嵌入式环境
    };
    
    struct EncryptionResult {
        std::vector<uint8_t> ciphertext;
        std::vector<uint8_t> auth_tag;  // GCM/Poly1305认证标签
        bool success;
    };
    
    EncryptionResult encryptUserData(
        Algorithm algo,
        const std::vector<uint8_t>& plaintext,
        const std::vector<uint8_t>& key,   // K_upenc
        const std::vector<uint8_t>& nonce, // 基于COUNT值生成
        const std::vector<uint8_t>& aad    // 附加认证数据
    ) {
        EncryptionResult result;
        
        switch (algo) {
        case Algorithm::AES_256_GCM:
            // 利用DSP批量加速接口
            result = CryptoAccelerator::aesGcmEncrypt(
                plaintext, key, nonce, aad
            );
            break;
            
        case Algorithm::CHACHA20_POLY1305:
            // ARM平台优化实现
            result = chacha20Poly1305Encrypt(
                plaintext, key, nonce, aad
            );
            break;
        }
        
        return result;
    }
    
    // 完整性验证(使用K_upint)
    bool verifyIntegrity(
        const std::vector<uint8_t>& message,
        const std::vector<uint8_t>& auth_tag,
        const std::vector<uint8_t>& key,   // K_upint
        const std::vector<uint8_t>& nonce
    ) {
        auto calculated_tag = CryptoAccelerator::batchHMACSHA256(
            message, key, nonce
        );
        return constantTimeCompare(calculated_tag, auth_tag);
    }
};

class AntiEavesdroppingModule {
private:
    BeamformingController beamformer_;
    WirelessFingerprint fingerprint_;
    
public:
    // 物理层安全增强：波束成形+人工噪声
    void enhancePhysicalLayerSecurity(const UserEquipment& ue) {
        // 1. 精确波束成形(降低旁瓣泄露)
        beamformer_.configureBeam(ue.getPosition(), BeamType::NEAR_FIELD);
        beamformer_.applySDRAlgorithm(); // 半定松弛算法优化
        
        // 2. 主动人工噪声注入
        if (ue.getSignalQuality() < threshold) {
            beamformer_.injectArtificialNoise(ue.getDirection());
        }
    }
    
    // 无线指纹轻量级身份校验
    bool verifyWirelessFingerprint(const CSI& channel_state) {
        auto expected_fingerprint = fingerprint_.extractFeatures(channel_state);
        auto current_fingerprint = fingerprint_.getStoredFingerprint(ue_id);
        
        return fingerprint_.similarityCheck(
            expected_fingerprint, 
            current_fingerprint, 
            similarity_threshold
        );
    }
};

class CountSynchronization {
private:
    std::atomic<uint32_t> tx_count_;
    std::atomic<uint32_t> rx_count_;
    ReplayProtection replay_protection_;
    
public:
    // COUNT值与MAC层HARQ严格同步
    void synchronizeWithMAC() {
        auto mac_harq_count = getCurrentHARQCount();
        if (mac_harq_count > tx_count_) {
            tx_count_.store(mac_harq_count);
        }
    }
    
    // 抗重放保护
    bool checkReplayProtection(uint32_t received_count) {
        return replay_protection_.checkAndUpdate(received_count);
    }
    
    // 多频段载波聚合的COUNT同步
    void syncCarrierAggregation(const std::vector<uint32_t>& carrier_counts) {
        uint32_t max_count = *std::max_element(carrier_counts.begin(), 
                                              carrier_counts.end());
        tx_count_.store(max_count);
    }
};

class DataEncryptionPipeline {
public:
    SecurityResult processUserData(
        const UserDataPacket& packet,
        const std::string& operator_snn
    ) {
        SecurityResult result;
        
        // 1. 选择运营商安全上下文(共建共享)
        if (!switchSecurityContext(operator_snn)) {
            result.error = SecurityError::CONTEXT_SWITCH_FAILED;
            return result;
        }
        
        // 2. COUNT同步与抗重放检查
        synchronizeWithMAC();
        if (!checkReplayProtection(packet.header.count)) {
            result.error = SecurityError::REPLAY_ATTACK_DETECTED;
            return result;
        }
        
        // 3. 生成加密参数
        auto nonce = generateNonceFromCount(pdcp_count_);
        auto aad = buildAdditionalAuthData(packet.header);
        
        // 4. 执行加密和完整性保护
        auto enc_result = crypto_engine_.encryptUserData(
            getOptimalAlgorithm(),  // 根据硬件自动选择
            packet.payload,
            current_keys_.K_upenc,
            nonce,
            aad
        );
        
        if (!enc_result.success) {
            result.error = SecurityError::ENCRYPTION_FAILED;
            return result;
        }
        
        // 5. 防窃听增强(可选)
        if (security_policy_.enable_physical_layer_security) {
            enhancePhysicalLayerSecurity(packet.ue_info);
        }
        
        result.ciphertext = std::move(enc_result.ciphertext);
        result.auth_tag = std::move(enc_result.auth_tag);
        result.success = true;
        
        return result;
    }
};

class SecurityExceptionHandler {
public:
    void handleKeyUpdateFailure() {
        // 安全回退至上一组有效密钥
        if (key_backup_.isValid()) {
            current_keys_ = key_backup_.getKeys();
            logger_.logSecurityEvent("Reverted to backup keys");
        }
        
        // 上报安全监控模块
        SecurityMonitor::reportIncident(
            SecurityIncident::KEY_UPDATE_FAILURE,
            getCurrentContext()
        );
    }
    
    void handleDecryptionFailure(const DecryptionException& e) {
        // COUNT失步恢复机制
        if (e.error_code == COUNT_DESYNCHRONIZATION) {
            performCountResynchronization();
        }
        
        // 密钥可能泄露，触发紧急更新
        if (e.error_code == AUTH_TAG_MISMATCH) {
            triggerEmergencyKeyUpdate();
        }
    }
};

// DSP批量加密优化(适用于高吞吐量场景)
class BatchEncryptionOptimizer {
public:
    std::vector<EncryptionResult> processBatch(
        const std::vector<UserDataPacket>& packets,
        const SessionKeySet& keys
    ) {
        // 利用DSP并行计算能力
        return CryptoAccelerator::parallelKeyDerivationAndEncrypt(
            packets, keys, getCurrentNonceBase()
        );
    }
    
    // 算法自适应选择(根据硬件能力)
    CryptoEngine::Algorithm getOptimalAlgorithm() const {
        if (CpuInfo::hasAESNI() && platform_ == Platform::X86_SERVER) {
            return CryptoEngine::Algorithm::AES_256_GCM;
        } else {
            return CryptoEngine::Algorithm::CHACHA20_POLY1305;
        }
    }
};

// 基于YD/T 4993-2024的切片安全隔离
class SliceAwareSecurityManager {
public:
    SecurityPolicy getSliceSecurityPolicy(int slice_id) {
        auto policy = slice_policies_[slice_id];
        
        // 增强型切片：更严格的加密和完整性保护
        if (slice_id == EMBMS_SLICE) {
            policy.min_key_update_interval = 30; // 30分钟强制更新
            policy.require_double_integrity_check = true;
        }
        
        // 物联网切片：优化能耗的轻量级安全
        if (slice_id == IoT_SLICE) {
            policy.enable_lightweight_crypto = true;
            policy.physical_layer_security_optional = true;
        }
        
        return policy;
    }
};