diff --git a/client/components/Reader/ServerStorage/ServerStorage.vue b/client/components/Reader/ServerStorage/ServerStorage.vue
index f65cf854..20291cb8 100644
--- a/client/components/Reader/ServerStorage/ServerStorage.vue
+++ b/client/components/Reader/ServerStorage/ServerStorage.vue
@@ -6,9 +6,11 @@
 //-----------------------------------------------------------------------------
 import Vue from 'vue';
 import Component from 'vue-class-component';
+import {Buffer} from 'safe-buffer';
 
 import bookManager from '../share/bookManager';
 import readerApi from '../../../api/reader';
+import * as utils from '../../../share/utils';
 
 export default @Component({
 })
@@ -18,10 +20,6 @@ class ServerStorage extends Vue {
     }
 
     async init() {
-        /*const items = {
-            '1': {rev: 1, data: 1},
-        };
-        console.log(await readerApi.storageSet(items));*/
     }
 
     get settings() {
diff --git a/client/share/utils.js b/client/share/utils.js
index e4c5bfa2..771f361c 100644
--- a/client/share/utils.js
+++ b/client/share/utils.js
@@ -1,21 +1,34 @@
+import baseX from 'base-x';
+import PAKO from 'pako';
+import {Buffer} from 'safe-buffer';
+
+export const pako = PAKO;
+
+const BASE58 = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
+const BASE64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+const bs58 = baseX(BASE58);
+const bs64 = baseX(BASE64);
+
 export function sleep(ms) {
     return new Promise(resolve => setTimeout(resolve, ms));
 }
 
 export function stringToHex(str) {
-    let result = '';
-    for (let i = 0; i < str.length; i++) {
-        result += str.charCodeAt(i).toString(16);
-    }
-    return result;
+    return Buffer.from(str).toString('hex');
 }
 
 export function hexToString(str) {
-    let result = '';
-    for (let i = 0; i < str.length; i += 2) {
-        result += String.fromCharCode(parseInt(str.substr(i, 2), 16));
-    }
-    return result;
+    return Buffer.from(str, 'hex').toString();
+}
+
+export function randomArray(len) {
+    const a = new Uint8Array(len);
+    crypto.getRandomValues(a);
+    return a;
+}
+
+export function randomHexString(len) {
+    return Buffer.from(randomArray(len)).toString('hex');
 }
 
 export function formatDate(d, format) {
@@ -62,4 +75,20 @@ export async function copyTextToClipboard(text) {
     }
 
     return result;
-}
\ No newline at end of file
+}
+
+export function toBase58(data) {
+    return bs58.encode(data);
+}
+
+export function fromBase58(data) {
+    return bs58.decode(data);
+}
+
+export function toBase64(data) {
+    return bs64.encode(data);
+}
+
+export function fromBase64(data) {
+    return bs64.decode(data);
+}
diff --git a/package-lock.json b/package-lock.json
index bb360b8f..634a8900 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "Liberama",
-  "version": "0.5.2",
+  "version": "0.5.6",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1596,6 +1596,14 @@
         }
       }
     },
+    "base-x": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/base-x/-/base-x-3.0.5.tgz",
+      "integrity": "sha512-C3picSgzPSLE+jW3tcBzJoGwitOtazb5B+5YmAxZm2ybmTi9LNgAtDO/jjVEBZwHoXmDBZ9m/IELj3elJVRBcA==",
+      "requires": {
+        "safe-buffer": "^5.0.1"
+      }
+    },
     "base64-js": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
@@ -7144,10 +7152,9 @@
       "dev": true
     },
     "pako": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.7.tgz",
-      "integrity": "sha512-3HNK5tW4x8o5mO8RuHZp3Ydw9icZXx0RANAOMzlMzx7LVXhMJ4mo3MOBpzyd7r/+RUu8BmndP47LXT+vzjtWcQ==",
-      "dev": true
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.10.tgz",
+      "integrity": "sha512-0DTvPVU3ed8+HNXOu5Bs+o//Mbdj9VNQMUOe9oKCwh8l0GNwpTDMKCWbRjgtD291AWnkAgkqA/LOnQS8AmS1tw=="
     },
     "parallel-transform": {
       "version": "1.1.0",
diff --git a/package.json b/package.json
index 71b5ffcc..11c237ea 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,7 @@
   },
   "dependencies": {
     "axios": "^0.18.0",
+    "base-x": "^3.0.5",
     "chardet": "^0.7.0",
     "compression": "^1.7.3",
     "element-ui": "^2.4.11",
@@ -70,7 +71,9 @@
     "lodash": "^4.17.11",
     "minimist": "^1.2.0",
     "multer": "^1.4.1",
+    "pako": "^1.0.10",
     "path-browserify": "^1.0.0",
+    "safe-buffer": "^5.1.2",
     "sql-template-strings": "^2.2.2",
     "sqlite": "^3.0.0",
     "tar-fs": "^2.0.0",