Add this module on page to be able to use the wijmo.pdf.IPdfDocumentOptions.ownerPassword, wijmo.pdf.IPdfDocumentOptions.permissions and wijmo.pdf.IPdfDocumentOptions.userPassword properties while creating an instance of the wijmo.pdf.PdfDocument class:

import { PdfDocument, saveBlob } from '@grapecity/wijmo.pdf';
import '@grapecity/wijmo.pdf.security';

let doc = new PdfDocument({
   userPassword: 'abc',
   ended: (doc, args) => {
      saveBlob(args.blob, 'document.pdf');
   }
});

doc.end();

This module incorporates modified versions of the buffer, crypto-js and saslprep libraries.