Delivering New Data Types With Plone NWU

1. Delivering New Data Types With Plone: © Blackboard, Inc. © Northwestern University All rights reserved. A Building Block for Versatile Content Management Patricia Goldweic, Brian Nielsen Northwestern University

9. Our Answer: the Application Link Maker B 2 And . . .

14. http request resource location one-way encryption key user identity course identity timestamp any other parameters

15. Receiver Processing confirms valid encryption: (user identity and timestamp) logs user on places user in “course”

16. Package edu.northwestern.at.encryptionutils package edu.northwestern.at.encryptionutils; import java.security.*; import java.util.*; import edu.northwestern.at.utils.*; import edu.northwestern.at.ntp.NUClockSkewUtils; /** * * This class implements a simple encryption (hashing) algorithm as follows: * * It provides the ability to: * - Encrypt a (string) password given as additional inputs a user id string, and a MessageDigest algorithm * (method 'encrypt'). The encryption is time-based and it is done using the MessageDigest class in * the JSDK, and using as inputs the string, the user id and the current time. * - Verify whether a given (encrypted) string has been obtained using the previous mechanism and * passes the 'time' test (that is, whether the encryption and verification happen within a restricted * time frame). (method: 'verify). * * * @author Patricia Goldweic */ public class EncryptionUtil { /** This algorithm's password */ private String m_pass; . . . (available, site TBD)

18. Q & A