diff --git a/.github/scripts/sanity_check.sh b/.github/scripts/sanity_check.sh
new file mode 100755
index 0000000..ff1c079
--- /dev/null
+++ b/.github/scripts/sanity_check.sh
@@ -0,0 +1,162 @@
+#!/usr/bin/env bash
+# =============================================================================
+# libsmx 安全性扫描脚本
+# =============================================================================
+# 被 CI 工作流调用，执行以下检查：
+#   1. 扫描非测试代码中的 panic!/unwrap()/expect()
+#   2. 检查是否有硬编码密钥泄露
+#   3. 验证 Cargo.toml 版本号与 Git Tag 匹配（仅在 tag 构建时）
+# =============================================================================
+
+set -euo pipefail
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+ERRORS=0
+
+pass() { echo -e "${GREEN}[PASS]${NC} $1"; }
+warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
+fail() { echo -e "${RED}[FAIL]${NC} $1"; ERRORS=$((ERRORS + 1)); }
+
+echo "=========================================="
+echo "  libsmx Security Sanity Checks"
+echo "=========================================="
+echo ""
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 1. 扫描非测试代码中的 panic!/unwrap()/expect()
+# ─────────────────────────────────────────────────────────────────────────────
+# Reason: 密码学库不应在非测试代码中 panic，应返回 Result/Option
+echo "--- 检查 panic/unwrap/expect ---"
+
+# 排除规则：
+#   - #[cfg(test)] 块和 mod tests 块内的代码
+#   - benches/ 和 tests/ 目录
+#   - 白名单：try_into().unwrap() 用于固定大小切片转换（已知安全）
+
+# 收集 src/ 下所有非测试 .rs 文件中的匹配项
+PANIC_HITS=$(grep -rn 'panic!\|\.unwrap()\|\.expect(' src/ --include='*.rs' \
+  | grep -v '#\[cfg(test)\]' \
+  | grep -v 'mod tests' \
+  | grep -v '// test' \
+  | grep -v '#\[test\]' \
+  | grep -v 'fn test_' \
+  || true)
+
+if [ -n "$PANIC_HITS" ]; then
+  # 统计行数
+  COUNT=$(echo "$PANIC_HITS" | wc -l)
+
+  # 分类统计
+  UNWRAP_COUNT=$(echo "$PANIC_HITS" | grep -c '\.unwrap()' || true)
+  EXPECT_COUNT=$(echo "$PANIC_HITS" | grep -c '\.expect(' || true)
+  PANIC_COUNT=$(echo "$PANIC_HITS" | grep -c 'panic!' || true)
+
+  # try_into().unwrap() 是固定大小切片转换的惯用法，已知不会 panic
+  SAFE_UNWRAP=$(echo "$PANIC_HITS" | grep -c 'try_into().unwrap()' || true)
+  UNSAFE_UNWRAP=$((UNWRAP_COUNT - SAFE_UNWRAP))
+
+  if [ "$PANIC_COUNT" -gt 0 ]; then
+    fail "发现 $PANIC_COUNT 处 panic! 调用（非测试代码）"
+    echo "$PANIC_HITS" | grep 'panic!' | head -5
+  fi
+
+  if [ "$UNSAFE_UNWRAP" -gt 0 ]; then
+    warn "发现 $UNSAFE_UNWRAP 处 .unwrap() 调用（不含 try_into().unwrap()）"
+    echo "$PANIC_HITS" | grep '\.unwrap()' | grep -v 'try_into().unwrap()' | head -5
+  fi
+
+  if [ "$EXPECT_COUNT" -gt 0 ]; then
+    warn "发现 $EXPECT_COUNT 处 .expect() 调用"
+    echo "$PANIC_HITS" | grep '\.expect(' | head -5
+  fi
+
+  if [ "$SAFE_UNWRAP" -gt 0 ]; then
+    echo -e "  ${GREEN}(白名单)${NC} $SAFE_UNWRAP 处 try_into().unwrap()（固定大小切片转换，已知安全）"
+  fi
+else
+  pass "非测试代码中无 panic/unwrap/expect"
+fi
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 2. 检查硬编码密钥/敏感信息
+# ─────────────────────────────────────────────────────────────────────────────
+echo ""
+echo "--- 检查硬编码敏感信息 ---"
+
+# Reason: 防止私钥、密码等敏感信息被提交到仓库
+SENSITIVE_PATTERNS='(private.?key|secret.?key|password|passwd|api.?key|token)\s*=\s*["\x27][^\x27"]+["\x27]'
+SENSITIVE_HITS=$(grep -rniE "$SENSITIVE_PATTERNS" src/ --include='*.rs' \
+  | grep -v '#\[cfg(test)\]' \
+  | grep -v 'mod tests' \
+  | grep -v '// test' \
+  | grep -v 'fn test_' \
+  || true)
+
+if [ -n "$SENSITIVE_HITS" ]; then
+  warn "发现疑似硬编码敏感信息（请人工审查）："
+  echo "$SENSITIVE_HITS" | head -5
+else
+  pass "未发现硬编码敏感信息"
+fi
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 3. 验证 Cargo.toml 版本号与 Git Tag 匹配
+# ─────────────────────────────────────────────────────────────────────────────
+echo ""
+echo "--- 检查版本号一致性 ---"
+
+CARGO_VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)".*/\1/')
+echo "  Cargo.toml version: $CARGO_VERSION"
+
+# 如果在 CI 中且有 GITHUB_REF_NAME（tag 构建），验证匹配
+if [ -n "${GITHUB_REF_NAME:-}" ] && [[ "${GITHUB_REF:-}" == refs/tags/v* ]]; then
+  TAG_VERSION="${GITHUB_REF_NAME#v}"
+  echo "  Git tag version:    $TAG_VERSION"
+  if [ "$TAG_VERSION" != "$CARGO_VERSION" ]; then
+    fail "Tag 版本 ($TAG_VERSION) 与 Cargo.toml 版本 ($CARGO_VERSION) 不匹配！"
+  else
+    pass "Tag 与 Cargo.toml 版本匹配"
+  fi
+else
+  echo "  (非 tag 构建，跳过版本匹配检查)"
+  pass "Cargo.toml 版本号格式正确: $CARGO_VERSION"
+fi
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 4. 检查 unsafe 代码
+# ─────────────────────────────────────────────────────────────────────────────
+echo ""
+echo "--- 检查 unsafe 代码 ---"
+
+UNSAFE_HITS=$(grep -rn 'unsafe' src/ --include='*.rs' \
+  | grep -v '#!\[forbid(unsafe_code)\]' \
+  | grep -v '// unsafe' \
+  | grep -v '#\[cfg(test)\]' \
+  | grep -v 'mod tests' \
+  || true)
+
+if [ -n "$UNSAFE_HITS" ]; then
+  fail "发现 unsafe 代码（本项目使用 #![forbid(unsafe_code)]）："
+  echo "$UNSAFE_HITS" | head -5
+else
+  pass "未发现 unsafe 代码"
+fi
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 汇总
+# ─────────────────────────────────────────────────────────────────────────────
+echo ""
+echo "=========================================="
+if [ "$ERRORS" -gt 0 ]; then
+  echo -e "  ${RED}发现 $ERRORS 个错��！${NC}"
+  echo "=========================================="
+  exit 1
+else
+  echo -e "  ${GREEN}所有安全检查通过${NC}"
+  echo "=========================================="
+  exit 0
+fi
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..dba55c0
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,273 @@
+# =============================================================================
+# libsmx CI/CD 工作流
+# =============================================================================
+# 触发条件：
+#   - main 分支的 push / PR → lint + test + coverage
+#   - v* tag 推送 → 上述全部 + 自动发布
+#   - PR → 额外运行 benchmark 并评论结果
+# =============================================================================
+
+name: CI
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+  pull_request:
+    branches: [main]
+
+# 同一 PR 的新提交自动取消旧的运行，节省 CI 资源
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+  # 强制使用 sparse 协议，加速 crates.io 索引同步
+  CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
+
+# =============================================================================
+# Job 1: 代码质量检查（格式化 + Clippy + 依赖漏洞扫描）
+# =============================================================================
+jobs:
+  lint:
+    name: Lint & Audit
+    runs-on: ubuntu-latest
+    steps:
+      - name: 签出代码
+        uses: actions/checkout@v4
+
+      - name: 安装 Rust 工具链（stable + rustfmt + clippy）
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - name: 缓存 Cargo 编译产物
+        uses: Swatinem/rust-cache@v2
+
+      - name: 检查代码格式
+        run: cargo fmt --check
+
+      - name: Clippy 检查（默认 features，所有警告视为错误）
+        run: cargo clippy --all-targets -- -D warnings
+
+      - name: Clippy 检查（no_std，无 alloc）
+        # Reason: alloc-gated 函数在 no_std 模式下会产生 "unused" 假阳性，
+        #         因此只做编译检查，不启用 -D warnings
+        run: cargo check --no-default-features
+
+      - name: 安装 cargo-audit
+        run: cargo install cargo-audit --locked
+
+      - name: 依赖漏洞扫描（CVE 检查）
+        run: cargo audit
+
+      - name: 安全性扫描（panic/unwrap 检查）
+        run: bash .github/scripts/sanity_check.sh
+        shell: bash
+
+  # =============================================================================
+  # Job 2: 多平台测试矩阵
+  # =============================================================================
+  test-matrix:
+    name: Test (${{ matrix.os }})
+    needs: lint
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: 签出代码
+        uses: actions/checkout@v4
+
+      - name: 安装 Rust 工具链（stable）
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: 缓存 Cargo 编译产物
+        uses: Swatinem/rust-cache@v2
+
+      # Reason: 在所有平台上显式设置 bash 以统一 Windows/Linux/macOS 行为
+      - name: 运行测试（默认 features = alloc）
+        run: cargo test --all-targets
+        shell: bash
+
+      - name: 运行测试（no_std，无 alloc）
+        # Reason: 验证嵌入式 / WASM / 裸机兼容性
+        run: cargo test --no-default-features --lib
+        shell: bash
+
+      - name: 运行文档测试
+        run: cargo test --doc
+        shell: bash
+
+      - name: 构建文档（警告视为错误）
+        run: cargo doc --no-deps
+        env:
+          RUSTDOCFLAGS: "-D warnings"
+        shell: bash
+
+  # =============================================================================
+  # Job 3: MSRV 验证（最低支持版本）
+  # =============================================================================
+  msrv:
+    name: MSRV (1.72.0)
+    needs: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: 签出代码
+        uses: actions/checkout@v4
+
+      - name: 安装 MSRV 工具链
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: "1.72.0"
+
+      - name: 缓存 Cargo 编译产物
+        uses: Swatinem/rust-cache@v2
+
+      # Reason: MSRV 只验证能编译，不运行测试（避免 dev-dependencies 兼容问题）
+      - name: 检查编译（默认 features）
+        run: cargo check
+
+      - name: 检查编译（no_std）
+        run: cargo check --no-default-features
+
+  # =============================================================================
+  # Job 4: 测试覆盖率（仅 Linux，上传 Codecov）
+  # =============================================================================
+  coverage:
+    name: Coverage
+    needs: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: 签出代码
+        uses: actions/checkout@v4
+
+      - name: 安装 Rust 工具链（stable）
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: 缓存 Cargo 编译产物
+        uses: Swatinem/rust-cache@v2
+
+      - name: 安装 cargo-tarpaulin
+        run: cargo install cargo-tarpaulin --locked
+
+      - name: 生成覆盖率报告
+        run: cargo tarpaulin --out xml --output-dir coverage/
+
+      - name: 上传覆盖率到 Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          files: coverage/cobertura.xml
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: false
+        # Reason: fail_ci_if_error=false 避免 Codecov 暂时不可用时阻断 CI
+
+  # =============================================================================
+  # Job 5: 性能回归检测（仅 PR 触发）
+  # =============================================================================
+  benchmark:
+    name: Benchmark
+    if: github.event_name == 'pull_request'
+    needs: lint
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - name: 签出 PR 代码
+        uses: actions/checkout@v4
+
+      - name: 安装 Rust 工具链（stable）
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: 缓存 Cargo 编译产物
+        uses: Swatinem/rust-cache@v2
+
+      # Reason: 先运行当前 PR 分支的 benchmark 并保存结果
+      - name: 运行 Benchmark
+        run: cargo bench --bench sm3_bench --bench sm4_bench --bench sm2_bench -- --output-format bencher 2>&1 | tee bench_output.txt
+        shell: bash
+
+      # Reason: 将 benchmark 结果作为 PR 评论发布，方便审查性能变化
+      - name: 发布 Benchmark 结果到 PR
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const benchOutput = fs.readFileSync('bench_output.txt', 'utf8');
+            const body = `## Benchmark Results\n\n<details>\n<summary>Click to expand</summary>\n\n\`\`\`\n${benchOutput}\n\`\`\`\n\n</details>\n\n> Benchmarks ran on \`ubuntu-latest\`. Results may vary across runs.`;
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              body: body
+            });
+
+  # =============================================================================
+  # Job 6: 自动发布到 crates.io（仅 v* Tag 触发）
+  # =============================================================================
+  release:
+    name: Release
+    if: startsWith(github.ref, 'refs/tags/v')
+    needs: [test-matrix, msrv]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: 签出代码
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: 安装 Rust 工具链（stable）
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: 缓存 Cargo 编译产物
+        uses: Swatinem/rust-cache@v2
+
+      # Reason: 确保 Git Tag 版本号与 Cargo.toml 中的 version 字段完全一致
+      - name: 验证 Tag 与 Cargo.toml 版本匹配
+        run: |
+          TAG_VERSION="${GITHUB_REF_NAME#v}"
+          CARGO_VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*"\(.*\)".*/\1/')
+          if [ "$TAG_VERSION" != "$CARGO_VERSION" ]; then
+            echo "::error::Tag version ($TAG_VERSION) does not match Cargo.toml version ($CARGO_VERSION)"
+            exit 1
+          fi
+          echo "Version: $TAG_VERSION ✓"
+        shell: bash
+
+      # Reason: 发布前最后一轮完整测试，防止 tag 推送后才发现问题
+      - name: 发布前完整测试
+        run: cargo test --all-targets
+
+      - name: 发布到 crates.io
+        run: cargo publish
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+
+      # Reason: 从 CHANGELOG.md 中提取当前版本的发布说明
+      - name: 提取 Changelog 条目
+        id: changelog
+        run: |
+          TAG_VERSION="${GITHUB_REF_NAME#v}"
+          # 提取 ## [x.y.z] 到下一个 ## 之间的内容
+          NOTES=$(awk "/^## \\[${TAG_VERSION}\\]/{found=1; next} /^## \\[/{if(found) exit} found{print}" CHANGELOG.md)
+          if [ -z "$NOTES" ]; then
+            NOTES="Release v${TAG_VERSION}"
+          fi
+          # 写入多行输出
+          echo "notes<<EOF" >> $GITHUB_OUTPUT
+          echo "$NOTES" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+        shell: bash
+
+      - name: 创建 GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          name: "v${{ github.ref_name }}"
+          body: ${{ steps.changelog.outputs.notes }}
+          draft: false
+          prerelease: ${{ contains(github.ref_name, '-') }}
+        # Reason: 如果 tag 包含 '-'（如 v0.4.0-rc1），标记为预发布
diff --git a/README.md b/README.md
index 3de1fd8..eee3b9d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,9 @@
 # libsmx
 
+[![CI](https://github.com/kintaiW/libsmx/actions/workflows/ci.yml/badge.svg)](https://github.com/kintaiW/libsmx/actions/workflows/ci.yml)
 [![Crates.io](https://img.shields.io/crates/v/libsmx.svg)](https://crates.io/crates/libsmx)
 [![docs.rs](https://img.shields.io/docsrs/libsmx)](https://docs.rs/libsmx)
+[![codecov](https://codecov.io/gh/kintaiW/libsmx/graph/badge.svg)](https://codecov.io/gh/kintaiW/libsmx)
 [![License](https://img.shields.io/crates/l/libsmx.svg)](LICENSE)
 [![MSRV](https://img.shields.io/badge/MSRV-1.72.0-blue.svg)](https://blog.rust-lang.org/2023/08/24/Rust-1.72.0.html)
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index da85e58..d223379 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -1,7 +1,9 @@
 # libsmx
 
+[![CI](https://github.com/kintaiW/libsmx/actions/workflows/ci.yml/badge.svg)](https://github.com/kintaiW/libsmx/actions/workflows/ci.yml)
 [![Crates.io](https://img.shields.io/crates/v/libsmx.svg)](https://crates.io/crates/libsmx)
 [![docs.rs](https://img.shields.io/docsrs/libsmx)](https://docs.rs/libsmx)
+[![codecov](https://codecov.io/gh/kintaiW/libsmx/graph/badge.svg)](https://codecov.io/gh/kintaiW/libsmx)
 [![License](https://img.shields.io/crates/l/libsmx.svg)](LICENSE)
 [![MSRV](https://img.shields.io/badge/MSRV-1.72.0-blue.svg)](https://blog.rust-lang.org/2023/08/24/Rust-1.72.0.html)
 
diff --git a/SECURITY.md b/SECURITY.md
index 69eea71..8f316b9 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -20,9 +20,8 @@ If you discover a security vulnerability in libsmx, please report it responsibly
 - Any potential impact assessment
 
 **Response timeline**:
-- Acknowledgment within **48 hours**
-- Initial assessment within **7 days**
-- Fix release within **30 days** for confirmed issues
+
+本项目由个人维护，响应时间不设固定期限。作者会尽快处理所有安全报告，但无法承诺具体的响应时间。
 
 ## Scope