5.1谁可以使用EACP？........................................................................................ 6 5.2 Step 1: Installation of cryptographic libraries ................................................... 6 5.3 Step 2: Follow the steps to acquire your digital certificate(s) ........................... 7 5.3.1 Understand your PKI practices!................................................................................ 7 5.3.2 Which Digital Certificate to purchase?......................................................................................................................................................................................................... 7 5.3.3如何购买数字证书？...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ..................................................................................................................................................................................................................................................................................................................................................................................... 9 5.4.3如何验证数字证书？ ...................................................................... 11 5.5 Step 4: Understanding your environment! ............................................................................................................................................................................... 12 5.5.1环境限制............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 9 5.4.3如何验证数字证书？...................................................................... 11 5.5 Step 4: Understanding your environment!............................................................................................................................................................................... 12 5.5.1环境限制.........................................................................................................................................................................................................