diff --git a/README.md b/README.md
index efe01711751b55e2a19c7b44eb1dddd3e0e94093..d560173ac2e618e4c36ef2a01063d857b4e414f0 100644
--- a/README.md
+++ b/README.md
@@ -1,37 +1,126 @@
 # virtCCA_sdk
 
-#### 介绍
+## 介绍
 The software development kit of virtCCA (virtualized ARM confidential computing architecture with trustzone), such as remote attestation, derived key based on hardware etc.
 
-#### 软件架构
-软件架构说明
+## 远程证明
 
+### 编译
 
-#### 安装教程
+1. 安装依赖
+    ```sh
+    yum install tar cmake make git gcc gcc-c++ openssl-devel glib2-devel
+    ```
 
-1.  xxxx
-2.  xxxx
-3.  xxxx
+2. 编译安装基线度量值计算工具
+    ```sh
+    cd attestation/rim_ref
+    cmake -S . -B build
+    cmake --build build
+    cp output/gen_rim_ref /usr/local/bin
+    ```
+    **基线度量值计算工具gen_rim_ref会安装到/usr/local/bin目录下**
 
-#### 使用说明
+3. 编译安装远程证明sdk
+    ```sh
+    cd attestation/sdk
+    cmake -S . -B build
+    cmake --build build
+    cmake --install build
+    ```
 
-1.  xxxx
-2.  xxxx
-3.  xxxx
+    **远程证明用户态静态库libvccaattestation.a会安装到/usr/local/lib目录下，头文件attestation.h会安装到/usr/local/include目录下**
 
-#### 参与贡献
+4. 编译安装`QCBOR 1.2`和`t_cose 1.1.2`依赖，编译远程证明样例代码和支持virtCCA的rats-tls需要使用:
+    ```sh
+    if [ ! -d "QCBOR" ]; then
+        git clone https://github.com/laurencelundblade/QCBOR.git -b v1.2
+    fi
+    if [ ! -d "t_cose" ]; then
+        git clone https://github.com/laurencelundblade/t_cose.git -b v1.1.2
+    fi
+    cd QCBOR
+    make
+    make install
+    cd ../t_cose
+    cmake -S . -B build
+    cmake --build build
+    cmake --install build
+    ```
 
-1.  Fork 本仓库
-2.  新建 Feat_xxx 分支
-3.  提交代码
-4.  新建 Pull Request
+5. 编译远程证明样例代码，样例代码需要依赖远程证明sdk、`QCBOR 1.2`和`t_cose 1.1.2`，需要提前安装好
 
+    **样例代码server端包含了调用远程证明sdk获取远程证明报告的代码，client端包含了报告解析和验证的代码，server和client使用TCP进行数据传递，代码仅供参考，建议使用rats-tls**
 
-#### 特技
+    ```sh
+    cd attestation/samples
+    cmake -S . -B build
+    cmake --build build
+    ```
+    **远程证明样例代码的server和client会生成到build目录下**
 
-1.  使用 Readme\_XXX.md 来支持不同的语言，例如 Readme\_en.md, Readme\_zh.md
-2.  Gitee 官方博客 [blog.gitee.com](https://blog.gitee.com)
-3.  你可以 [https://gitee.com/explore](https://gitee.com/explore) 这个地址来了解 Gitee 上的优秀开源项目
-4.  [GVP](https://gitee.com/gvp) 全称是 Gitee 最有价值开源项目，是综合评定出的优秀开源项目
-5.  Gitee 官方提供的使用手册 [https://gitee.com/help](https://gitee.com/help)
-6.  Gitee 封面人物是一档用来展示 Gitee 会员风采的栏目 [https://gitee.com/gitee-stars/](https://gitee.com/gitee-stars/)
+6. 编译安装`libcbor`依赖，编译支持virtCCA的rats-tls需要使用:
+    ```sh
+    git clone https://github.com/PJK/libcbor.git
+    cd libcbor
+    cmake -S . -B build
+    cd build
+    make
+    make install
+    ```
+
+7. 编译支持virtCCA的rats-tls，rats-tls需要依赖远程证明sdk、`libcbor`、`QCBOR 1.2`和`t_cose 1.1.2`，需要提前安装好
+    ```sh
+    cd attestation/rats-tls
+    git clone https://github.com/inclavare-containers/rats-tls.git
+    cd rats-tls
+    git reset --hard 40f7b78403d75d13b1a372c769b2600f62b02692
+    git apply ../*.patch
+    bash build.sh -s -r
+    ```
+
+    **编译完成后会在bin目录下生成rats-tls.tar.gz软件包**
+
+8. 编译启动时证明使用的initramfs，initramfs需要依赖支持virtCCA的rats-tls，需要提前编译好
+    ```sh
+    cd attestation/initramfs
+    bash build.sh
+    ```
+
+### 使用说明
+
+#### 远程证明样例代码
+
+1. 启动server，server参数说明请使用`server -h`查看
+    ```sh
+    ./server
+    ```
+
+2. 启动client, 可以使用-m参数传递机密虚机的基线度量值用于校验，基线度量值可以使用基线度量值计算工具计算得到，client参数说明请使用`client -h`查看
+    ```sh
+    ./client -m 38d644db0aeddedbf9e11a50dd56fb2d0c663f664d63ad62762490da41562108
+    ```
+
+
+#### 支持virtCCA的rats-tls
+1. 将rats-tls编译生产的rats-tls.tar.gz软件包拷贝到需要使用的机器，然后执行解压命令：
+    ```sh
+    tar -zxf rats-tls.tar.gz
+    ```
+
+2. 将rats-tls的动态库复制到/usr/lib目录下
+    ```sh
+    cp -r lib/rats-tls /usr/lib/
+    ```
+
+3. 导入环境变量后运行virtcca-server，virtcca-server参数说明请使用`virtcca-server -h`查看
+    ```sh
+    export LD_LIBRARY_PATH=/usr/lib/rats-tls:$LD_LIBRARY_PATH
+    ./virtcca-server
+    ```
+
+3. 导入环境变量后运行virtcca-client，virtcca-client参数说明请使用`virtcca-client -h`查看
+    ```sh
+    export LD_LIBRARY_PATH=/usr/lib/rats-tls:$LD_LIBRARY_PATH
+    ./virtcca-client
+    ```
diff --git a/attestation/initramfs/br2_external/board/virtcca_qemu/rootfs_overlay/etc/init.d/rcA b/attestation/initramfs/br2_external/board/virtcca_qemu/rootfs_overlay/etc/init.d/rcA
index 5ae2c572608b5d93900d93d80ea4f8ea1a78b072..11d2649c8690741c0571900bb91188a188c9edba 100755
--- a/attestation/initramfs/br2_external/board/virtcca_qemu/rootfs_overlay/etc/init.d/rcA
+++ b/attestation/initramfs/br2_external/board/virtcca_qemu/rootfs_overlay/etc/init.d/rcA
@@ -7,13 +7,17 @@ sleep 10
 ip a
 
 ip_addr=$(ip a | grep inet | grep -v inet6 | grep -v 127 | awk -F' ' '{print $2}' | awk -F'/' '{print $1}')
+if [ "$ip_addr" == "" ]; then
+    echo "Cannot not get ip addr."
+    exit 1
+fi
 echo "IP address: $ip_addr"
 
-server -i $ip_addr
+/usr/bin/virtcca-server -i $ip_addr
 exit_status=$?
 echo "server return $exit_status"
 
-if [ $exit_status -eq 0 ]; then
+if [ $exit_status -eq 103 ]; then
     # mount the new root
     echo "Mounting new root filesystem..."
     mkdir -p /newroot
diff --git a/attestation/initramfs/build.sh b/attestation/initramfs/build.sh
index 7beae5883ff4b233e710c559c2b42090a65fc781..354f17814d6776337e3d5ffbe997aa5910d6e18f 100755
--- a/attestation/initramfs/build.sh
+++ b/attestation/initramfs/build.sh
@@ -6,10 +6,10 @@ OUTPUT_DIR=${INITRAMFS_PROJ_DIR}/buildroot/output
 APP_INSTALL_DIR=${INITRAMFS_PROJ_DIR}/br2_external/board/virtcca_qemu/rootfs_overlay
 export BR2_EXTERNAL=${INITRAMFS_PROJ_DIR}/br2_external
 
-# prepare to install TSI server
-TSI_SERVER_BIN=${INITRAMFS_PROJ_DIR}/../samples/build/server
-if [ ! -f "${TSI_SERVER_BIN}" ]; then
-    echo "Cannot find ${TSI_SERVER_BIN}"
+# prepare to install rats-tls server
+RATS_TLS_BIN=${INITRAMFS_PROJ_DIR}/../rats-tls/rats-tls/bin/rats-tls.tar.gz
+if [ ! -f "${RATS_TLS_BIN}" ]; then
+    echo "Cannot find ${RATS_TLS_BIN}"
     exit 1
 fi
 
@@ -19,8 +19,12 @@ rm -rf ${APP_INSTALL_DIR}/usr
 mkdir -p ${APP_INSTALL_DIR}/tmp
 mkdir -p ${APP_INSTALL_DIR}/usr/bin
 
-# install TSI server
-cp -rf ${INITRAMFS_PROJ_DIR}/../samples/build/server ${APP_INSTALL_DIR}/usr/bin/
+# install rats-tls server
+cd ${APP_INSTALL_DIR}/tmp
+cp $RATS_TLS_BIN ./
+tar -zxf rats-tls.tar.gz
+cp -rf ${APP_INSTALL_DIR}/tmp/lib ${APP_INSTALL_DIR}/usr/
+cp -rf ${APP_INSTALL_DIR}/tmp/virtcca-server ${APP_INSTALL_DIR}/usr/bin/
 
 # clean up
 rm -rf ${APP_INSTALL_DIR}/tmp
@@ -28,6 +32,6 @@ pushd ${INITRAMFS_PROJ_DIR}
 
 # initramfs build process
 if [ ! -d "buildroot" ]; then
-    git clone https://gitlab.com/buildroot.org/buildroot.git -b 2024.02
+    git clone https://gitlab.com/buildroot.org/buildroot.git -b 2023.02.11
 fi
 cd buildroot && make clean && make virtcca_qemu_defconfig && make
diff --git a/attestation/rim_ref/CMakeLists.txt b/attestation/rim_ref/CMakeLists.txt
index 56917062b99ceaadf659c7cdb6b4cdcb7d68de36..6c75416ec1df081a6d91d0384fd8d1c299e621ff 100644
--- a/attestation/rim_ref/CMakeLists.txt
+++ b/attestation/rim_ref/CMakeLists.txt
@@ -1,8 +1,8 @@
 # CMake version
-cmake_minimum_required(VERSION 3.5.1)
+cmake_minimum_required(VERSION 3.16)
 
 # Project
-project(gen_rim_ref)
+project(gen_rim_ref LANGUAGES C)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 find_package(OpenSSL REQUIRED)
 find_package(PkgConfig REQUIRED)
diff --git a/attestation/samples/CMakeLists.txt b/attestation/samples/CMakeLists.txt
index 03d3451b1b38f871840491d68c55399ed20a16ce..947d6665660071202d69bac6ade9dca1ba258561 100644
--- a/attestation/samples/CMakeLists.txt
+++ b/attestation/samples/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 project(tsi-samples
     LANGUAGES C)
 
diff --git a/attestation/sdk/CMakeLists.txt b/attestation/sdk/CMakeLists.txt
index be7dca912e7e2cb846d27b7717759569fe50ac1e..a5b51ab48f2f46f4980b6ee12eec95a2919bf2ce 100644
--- a/attestation/sdk/CMakeLists.txt
+++ b/attestation/sdk/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.16)
 project(virtcca-sdk
     LANGUAGES C)