v-link" @click="show=3" :class="{'active':show===3}" href="javascript:">公私钥对验证</a></li>
                <li class="nav-item"><a class="nav-link" @click="show=4" :class="{'active':show===4}" href="javascript:">公钥导出</a></li>
                <li class="nav-item"><a class="nav-link" @click="show=5" :class="{'active':show===5}" href="javascript:">私钥加解密</a></li>
            </ul>
            <div class="tab-content">
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