diff --git a/angular.json b/angular.json
index fb6dca3f..0715f12b 100644
--- a/angular.json
+++ b/angular.json
@@ -1720,6 +1720,39 @@
           }
         }
       }
+    },
+    "ucap-webmessenger-daesang": {
+      "projectType": "library",
+      "root": "projects/ucap-webmessenger-daesang",
+      "sourceRoot": "projects/ucap-webmessenger-daesang/src",
+      "prefix": "ucap-daesang",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-ng-packagr:build",
+          "options": {
+            "tsConfig": "projects/ucap-webmessenger-daesang/tsconfig.lib.json",
+            "project": "projects/ucap-webmessenger-daesang/ng-package.json"
+          }
+        },
+        "test": {
+          "builder": "@angular-devkit/build-angular:karma",
+          "options": {
+            "main": "projects/ucap-webmessenger-daesang/src/test.ts",
+            "tsConfig": "projects/ucap-webmessenger-daesang/tsconfig.spec.json",
+            "karmaConfig": "projects/ucap-webmessenger-daesang/karma.conf.js"
+          }
+        },
+        "lint": {
+          "builder": "@angular-devkit/build-angular:tslint",
+          "options": {
+            "tsConfig": [
+              "projects/ucap-webmessenger-daesang/tsconfig.lib.json",
+              "projects/ucap-webmessenger-daesang/tsconfig.spec.json"
+            ],
+            "exclude": ["**/node_modules/**"]
+          }
+        }
+      }
     }
   },
   "defaultProject": "ucap-webmessenger-app"
diff --git a/electron-projects/ucap-webmessenger-electron/src/index.ts b/electron-projects/ucap-webmessenger-electron/src/index.ts
index e84ff168..0fb16520 100644
--- a/electron-projects/ucap-webmessenger-electron/src/index.ts
+++ b/electron-projects/ucap-webmessenger-electron/src/index.ts
@@ -287,32 +287,32 @@ ipcMain.on(UpdaterChannel.Check, (event: IpcMainEvent, ...args: any[]) => {
 ipcMain.on(
   UpdaterChannel.StartCheckInstant,
   (event: IpcMainEvent, ...args: any[]) => {
-    const config = args[0] as UpdateCheckConfig;
-    if (!!rendererUpdater) {
-      rendererUpdater.stopCheck();
-      rendererUpdater = null;
-    }
-    rendererUpdater = new RendererUpdater(appWindow.browserWindow, config); // default 10min
-    rendererUpdater.startCheck();
+    // const config = args[0] as UpdateCheckConfig;
+    // if (!!rendererUpdater) {
+    //   rendererUpdater.stopCheck();
+    //   rendererUpdater = null;
+    // }
+    // rendererUpdater = new RendererUpdater(appWindow.browserWindow, config); // default 10min
+    // rendererUpdater.startCheck();
   }
 );
 
 ipcMain.on(
   UpdaterChannel.StopCheckInstant,
   (event: IpcMainEvent, ...args: any[]) => {
-    if (!!rendererUpdater) {
-      rendererUpdater.stopCheck();
-      rendererUpdater = null;
-    }
+    // if (!!rendererUpdater) {
+    //   rendererUpdater.stopCheck();
+    //   rendererUpdater = null;
+    // }
   }
 );
 
 ipcMain.on(
   UpdaterChannel.ApplyInstant,
   (event: IpcMainEvent, ...args: any[]) => {
-    if (!!rendererUpdater) {
-      rendererUpdater.apply();
-    }
+    // if (!!rendererUpdater) {
+    //   rendererUpdater.apply();
+    // }
   }
 );
 
diff --git a/projects/ucap-webmessenger-app/src/app/app.module.ts b/projects/ucap-webmessenger-app/src/app/app.module.ts
index 6e3a5d86..1b3d1573 100644
--- a/projects/ucap-webmessenger-app/src/app/app.module.ts
+++ b/projects/ucap-webmessenger-app/src/app/app.module.ts
@@ -33,6 +33,8 @@ import { UCapServiceProtocolModule } from '@ucap-webmessenger/protocol-service';
 import { UCapStatusProtocolModule } from '@ucap-webmessenger/protocol-status';
 import { UCapSyncProtocolModule } from '@ucap-webmessenger/protocol-sync';
 
+import { UCapDaesangModule } from '@ucap-webmessenger/daesang';
+
 import { LoggerModule, NgxLoggerLevel } from 'ngx-logger';
 
 import { AppProviderModule } from './app-provider.module';
@@ -79,6 +81,8 @@ import { environment } from '../environments/environment';
     UCapStatusProtocolModule.forRoot(),
     UCapSyncProtocolModule.forRoot(),
 
+    UCapDaesangModule.forRoot(),
+
     UCapUiModule.forRoot(),
     UCapUiAccountModule.forRoot(),
 
diff --git a/projects/ucap-webmessenger-app/src/app/services/authentication.service.ts b/projects/ucap-webmessenger-app/src/app/services/authentication.service.ts
index 65e38deb..3b2823ce 100644
--- a/projects/ucap-webmessenger-app/src/app/services/authentication.service.ts
+++ b/projects/ucap-webmessenger-app/src/app/services/authentication.service.ts
@@ -9,6 +9,7 @@ import { LoginInfo, KEY_LOGIN_INFO } from '../types';
 import { KEY_VER_INFO } from '@app/types/ver-info.type';
 import { KEY_LOGIN_RES_INFO } from '@app/types/login-res-info.type';
 import { PasswordUtil } from '@ucap-webmessenger/pi';
+import { DaesangCipherService } from '@ucap-webmessenger/daesang';
 
 @Injectable({
   providedIn: 'root'
@@ -18,7 +19,8 @@ export class AppAuthenticationService {
 
   constructor(
     private sessionStorageService: SessionStorageService,
-    private localStorageService: LocalStorageService
+    private localStorageService: LocalStorageService,
+    private daesangCipherService: DaesangCipherService
   ) {}
 
   authenticated(): boolean {
@@ -32,7 +34,12 @@ export class AppAuthenticationService {
     this.sessionStorageService.set<LoginInfo>(KEY_LOGIN_INFO, {
       ...loginInfo,
       initPw: loginInfo.loginId === loginInfo.loginPw,
-      loginPw: PasswordUtil.encrypt(loginInfo.loginPw)
+      // loginPw: PasswordUtil.encrypt(loginInfo.loginPw)
+      loginPw: this.daesangCipherService.encrypt(
+        'DaesangSSOProject',
+        loginInfo.loginPw,
+        'N'
+      )
     });
 
     if (rememberMe) {
diff --git a/projects/ucap-webmessenger-daesang/README.md b/projects/ucap-webmessenger-daesang/README.md
new file mode 100644
index 00000000..de5e6841
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/README.md
@@ -0,0 +1,24 @@
+# UcapWebmessengerDaesang
+
+This library was generated with [Angular CLI](https://github.com/angular/angular-cli) version 8.2.11.
+
+## Code scaffolding
+
+Run `ng generate component component-name --project ucap-webmessenger-daesang` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module --project ucap-webmessenger-daesang`.
+> Note: Don't forget to add `--project ucap-webmessenger-daesang` or else it will be added to the default project in your `angular.json` file. 
+
+## Build
+
+Run `ng build ucap-webmessenger-daesang` to build the project. The build artifacts will be stored in the `dist/` directory.
+
+## Publishing
+
+After building your library with `ng build ucap-webmessenger-daesang`, go to the dist folder `cd dist/ucap-webmessenger-daesang` and run `npm publish`.
+
+## Running unit tests
+
+Run `ng test ucap-webmessenger-daesang` to execute the unit tests via [Karma](https://karma-runner.github.io).
+
+## Further help
+
+To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI README](https://github.com/angular/angular-cli/blob/master/README.md).
diff --git a/projects/ucap-webmessenger-daesang/karma.conf.js b/projects/ucap-webmessenger-daesang/karma.conf.js
new file mode 100644
index 00000000..dcf20eca
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/karma.conf.js
@@ -0,0 +1,32 @@
+// Karma configuration file, see link for more information
+// https://karma-runner.github.io/1.0/config/configuration-file.html
+
+module.exports = function (config) {
+  config.set({
+    basePath: '',
+    frameworks: ['jasmine', '@angular-devkit/build-angular'],
+    plugins: [
+      require('karma-jasmine'),
+      require('karma-chrome-launcher'),
+      require('karma-jasmine-html-reporter'),
+      require('karma-coverage-istanbul-reporter'),
+      require('@angular-devkit/build-angular/plugins/karma')
+    ],
+    client: {
+      clearContext: false // leave Jasmine Spec Runner output visible in browser
+    },
+    coverageIstanbulReporter: {
+      dir: require('path').join(__dirname, '../../coverage/ucap-webmessenger-daesang'),
+      reports: ['html', 'lcovonly', 'text-summary'],
+      fixWebpackSourcePaths: true
+    },
+    reporters: ['progress', 'kjhtml'],
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_INFO,
+    autoWatch: true,
+    browsers: ['Chrome'],
+    singleRun: false,
+    restartOnFileChange: true
+  });
+};
diff --git a/projects/ucap-webmessenger-daesang/ng-package.json b/projects/ucap-webmessenger-daesang/ng-package.json
new file mode 100644
index 00000000..351b484e
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/ng-package.json
@@ -0,0 +1,7 @@
+{
+  "$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
+  "dest": "../../dist/ucap-webmessenger-daesang",
+  "lib": {
+    "entryFile": "src/public-api.ts"
+  }
+}
\ No newline at end of file
diff --git a/projects/ucap-webmessenger-daesang/package.json b/projects/ucap-webmessenger-daesang/package.json
new file mode 100644
index 00000000..c202d77c
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "@ucap-webmessenger/daesang",
+  "version": "0.0.1",
+  "peerDependencies": {
+    "@angular/common": "^8.2.11",
+    "@angular/core": "^8.2.11"
+  }
+}
diff --git a/projects/ucap-webmessenger-daesang/src/lib/models/CipherKeyDTD.ts b/projects/ucap-webmessenger-daesang/src/lib/models/CipherKeyDTD.ts
new file mode 100644
index 00000000..556236dd
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/lib/models/CipherKeyDTD.ts
@@ -0,0 +1,4 @@
+export interface CipherKeyDTD {
+  key: Uint8Array;
+  iv: Uint8Array;
+}
diff --git a/projects/ucap-webmessenger-daesang/src/lib/services/daesang-cipher.service.spec.ts b/projects/ucap-webmessenger-daesang/src/lib/services/daesang-cipher.service.spec.ts
new file mode 100644
index 00000000..9fa31fb6
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/lib/services/daesang-cipher.service.spec.ts
@@ -0,0 +1,12 @@
+import { TestBed } from '@angular/core/testing';
+
+import { DaesangCipherService } from './daesang-cipher.service';
+
+describe('DaesangCipherService', () => {
+  beforeEach(() => TestBed.configureTestingModule({}));
+
+  it('should be created', () => {
+    const service: DaesangCipherService = TestBed.get(DaesangCipherService);
+    expect(service).toBeTruthy();
+  });
+});
diff --git a/projects/ucap-webmessenger-daesang/src/lib/services/daesang-cipher.service.ts b/projects/ucap-webmessenger-daesang/src/lib/services/daesang-cipher.service.ts
new file mode 100644
index 00000000..8ba8a014
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/lib/services/daesang-cipher.service.ts
@@ -0,0 +1,37 @@
+import { Injectable } from '@angular/core';
+
+import crypto from 'crypto';
+
+import { CipherUtil } from '../utils/CipherUtil';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class DaesangCipherService {
+  constructor() {}
+
+  encrypt(pvUserKey: string, pvSource: string, isBase64: string): string {
+    const cipherKeyDTD = CipherUtil.makeCipherKey('AES', pvUserKey);
+
+    const cipher = crypto.createCipheriv(
+      'aes-128-cbc',
+      cipherKeyDTD.key,
+      cipherKeyDTD.iv
+    );
+    cipher.setAutoPadding(true);
+
+    let outputEncoding: 'base64' | 'hex';
+
+    if ('Y' === isBase64) {
+      outputEncoding = 'base64';
+    } else {
+      outputEncoding = 'hex';
+    }
+
+    const cipherChunks = [];
+    cipherChunks.push(cipher.update(pvSource, 'utf8', outputEncoding));
+    cipherChunks.push(cipher.final(outputEncoding));
+
+    return cipherChunks.join('');
+  }
+}
diff --git a/projects/ucap-webmessenger-daesang/src/lib/ucap-daesang.module.ts b/projects/ucap-webmessenger-daesang/src/lib/ucap-daesang.module.ts
new file mode 100644
index 00000000..d0c57055
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/lib/ucap-daesang.module.ts
@@ -0,0 +1,19 @@
+import { NgModule, ModuleWithProviders } from '@angular/core';
+
+import { DaesangCipherService } from './services/daesang-cipher.service';
+
+const SERVICES = [DaesangCipherService];
+
+@NgModule({
+  declarations: [],
+  imports: [],
+  exports: []
+})
+export class UCapDaesangModule {
+  public static forRoot(): ModuleWithProviders<UCapDaesangModule> {
+    return {
+      ngModule: UCapDaesangModule,
+      providers: [...SERVICES]
+    };
+  }
+}
diff --git a/projects/ucap-webmessenger-daesang/src/lib/utils/ByteUtils.ts b/projects/ucap-webmessenger-daesang/src/lib/utils/ByteUtils.ts
new file mode 100644
index 00000000..f501ce1c
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/lib/utils/ByteUtils.ts
@@ -0,0 +1,32 @@
+export class ByteUtils {
+  static toBytesFromHexString(hex: string): Uint8Array {
+    if (!hex) {
+      return new Uint8Array();
+    }
+    return new Uint8Array(hex.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
+  }
+
+  static toHexString(bytes: Uint8Array): string {
+    if (!bytes) {
+      return '';
+    }
+    return bytes.reduce(
+      (str, byte) => str + byte.toString(16).padStart(2, '0'),
+      ''
+    );
+  }
+
+  static toBytesFromString(s: string): Uint8Array {
+    if (!s) {
+      return new Uint8Array();
+    }
+    return new TextEncoder().encode(s);
+  }
+
+  static toStringFromBytes(bytes: Uint8Array): string {
+    if (!bytes) {
+      return '';
+    }
+    return new TextDecoder('utf-8').decode(bytes);
+  }
+}
diff --git a/projects/ucap-webmessenger-daesang/src/lib/utils/CipherUtil.ts b/projects/ucap-webmessenger-daesang/src/lib/utils/CipherUtil.ts
new file mode 100644
index 00000000..df08fbd6
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/lib/utils/CipherUtil.ts
@@ -0,0 +1,41 @@
+import CryptoJS from 'crypto-js';
+
+import { ByteUtils } from './ByteUtils';
+import { CipherKeyDTD } from '../models/CipherKeyDTD';
+
+export class CipherUtil {
+  static makeCipherKey(pvAlgorithm: string, pvUserKey: string): CipherKeyDTD {
+    let keyBytes: Uint8Array;
+    let ivBytes: Uint8Array;
+
+    if (
+      !pvUserKey ||
+      '' === pvUserKey.trim() ||
+      'eMateOnepass_SSO' === pvUserKey
+    ) {
+      keyBytes = ByteUtils.toBytesFromString('eMateOnepass_SSO');
+      ivBytes = ByteUtils.toBytesFromString('eMateOnepass_SSO');
+    } else if (
+      '201007GYCSSOPROJ' === pvUserKey ||
+      '201005KICSSOPROJ' === pvUserKey
+    ) {
+      keyBytes = ByteUtils.toBytesFromString(pvUserKey);
+      ivBytes = ByteUtils.toBytesFromString(pvUserKey);
+    } else {
+      const bytes = ByteUtils.toBytesFromHexString(
+        CryptoJS.SHA1(pvUserKey).toString()
+      );
+
+      keyBytes = bytes.slice(0, 16);
+
+      ivBytes = ByteUtils.toBytesFromHexString(
+        CryptoJS.SHA1(ByteUtils.toHexString(bytes.slice(16, 20))).toString()
+      ).slice(0, 16);
+    }
+
+    return {
+      key: keyBytes,
+      iv: ivBytes
+    } as CipherKeyDTD;
+  }
+}
diff --git a/projects/ucap-webmessenger-daesang/src/public-api.ts b/projects/ucap-webmessenger-daesang/src/public-api.ts
new file mode 100644
index 00000000..a59808f2
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/public-api.ts
@@ -0,0 +1,7 @@
+/*
+ * Public API Surface of ucap-webmessenger-daesang
+ */
+
+export * from './lib/services/daesang-cipher.service';
+
+export * from './lib/ucap-daesang.module';
diff --git a/projects/ucap-webmessenger-daesang/src/test.ts b/projects/ucap-webmessenger-daesang/src/test.ts
new file mode 100644
index 00000000..978c64fb
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/src/test.ts
@@ -0,0 +1,21 @@
+// This file is required by karma.conf.js and loads recursively all the .spec and framework files
+
+import 'zone.js/dist/zone';
+import 'zone.js/dist/zone-testing';
+import { getTestBed } from '@angular/core/testing';
+import {
+  BrowserDynamicTestingModule,
+  platformBrowserDynamicTesting
+} from '@angular/platform-browser-dynamic/testing';
+
+declare const require: any;
+
+// First, initialize the Angular testing environment.
+getTestBed().initTestEnvironment(
+  BrowserDynamicTestingModule,
+  platformBrowserDynamicTesting()
+);
+// Then we find all the tests.
+const context = require.context('./', true, /\.spec\.ts$/);
+// And load the modules.
+context.keys().map(context);
diff --git a/projects/ucap-webmessenger-daesang/tsconfig.lib.json b/projects/ucap-webmessenger-daesang/tsconfig.lib.json
new file mode 100644
index 00000000..bd23948e
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/tsconfig.lib.json
@@ -0,0 +1,26 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../out-tsc/lib",
+    "target": "es2015",
+    "declaration": true,
+    "inlineSources": true,
+    "types": [],
+    "lib": [
+      "dom",
+      "es2018"
+    ]
+  },
+  "angularCompilerOptions": {
+    "annotateForClosureCompiler": true,
+    "skipTemplateCodegen": true,
+    "strictMetadataEmit": true,
+    "fullTemplateTypeCheck": true,
+    "strictInjectionParameters": true,
+    "enableResourceInlining": true
+  },
+  "exclude": [
+    "src/test.ts",
+    "**/*.spec.ts"
+  ]
+}
diff --git a/projects/ucap-webmessenger-daesang/tsconfig.spec.json b/projects/ucap-webmessenger-daesang/tsconfig.spec.json
new file mode 100644
index 00000000..16da33db
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/tsconfig.spec.json
@@ -0,0 +1,17 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../out-tsc/spec",
+    "types": [
+      "jasmine",
+      "node"
+    ]
+  },
+  "files": [
+    "src/test.ts"
+  ],
+  "include": [
+    "**/*.spec.ts",
+    "**/*.d.ts"
+  ]
+}
diff --git a/projects/ucap-webmessenger-daesang/tslint.json b/projects/ucap-webmessenger-daesang/tslint.json
new file mode 100644
index 00000000..77e2b18a
--- /dev/null
+++ b/projects/ucap-webmessenger-daesang/tslint.json
@@ -0,0 +1,17 @@
+{
+  "extends": "../../tslint.json",
+  "rules": {
+    "directive-selector": [
+      true,
+      "attribute",
+      "ucapDaesang",
+      "camelCase"
+    ],
+    "component-selector": [
+      true,
+      "element",
+      "ucap-daesang",
+      "kebab-case"
+    ]
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
index 2b65e11b..c4514639 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -146,6 +146,9 @@
       ],
       "@ucap-webmessenger/electron": [
         "electron-projects/ucap-webmessenger-electron/src/public-api"
+      ],
+      "@ucap-webmessenger/daesang": [
+        "projects/ucap-webmessenger-daesang/src/public-api"
       ]
     }
   },