# 加密解密 ```math E_k(p) = c,D_k(c) = p ``` ```math E_{pk}(p) = c,D_{sk}(c) = p ``` E : 加密算法 D : 解密算法 pk : Public Key 公钥 sk : Securite Key (Private Key) 私钥 # 签名验证 ```math Sign_{sk}(m) = s,Verify_{pk}(m,s) = ok? ``` Sign : 签名算法 Verify : 验证算法 pk : Public Key 公钥 sk : Securite Key (Private Key...

Open System Interconnection Reference Model maintained by the identification ISO/IEC 7498-1 开放式系统互联通信参考模型 | 层 | 协议数据单元 | 功能 | | :------------ | :------------ | :------------ | | 7.应用层(Application) | 数据(Data) | 高级API,包括资源共享,远程文件访问等 | | 6.表示层(Presentation) | 数据(Data) | 网络服务和应用程序之间的数据转换 | | 5.会...

写此文时Nginx的版本为 : nginx-1.12.2 内置变量官方连接:http://nginx.org/en/docs/http/ngx_http_core_module.html#var_args ## 常见内置变量 | 内置变量 | | | :- |:-| | $arg_NAME | 请求参数中对应NAME的值 | | $args | 请求参数 | | $binary_remote_addr | 二进制形式的客户端地址 | | $body_bytes_sent | 发送给客户端的字节数,不包括响应头 | | $bytes_sent | 发送给客户端的字节数 | | $con...

Certbot, Automatically enable HTTPS on your website with EFF's Certbot, deploying Let's Encrypt certificates. ``` # python --version Python 2.7.5 # ``` ## Install Virtual ``` # pip install virtualenv ``` ## Create Venv For Certbot ``` # mkdir /usr/local/virtualenv # cd /usr/local/virtualenv # vir...

If your server monitored by program,such as zabbix,JianKongBao,you can view server's network usage by these program. Sometimes you need login your sever and monitor the network usage on time.You can chose belowe tools. 1 Byte = 8 bit 1 KB = 1024 Byte 1 kb = 1000 bit ## 1. nload nload - displa...

1. Start Registry Editor. Press Win+R, input 'regedit',then press Enter. 2. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp\PortNumber 3. On the Edit menu, click Modify, and then click Decimal. ...