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OGCIO

Level AAA − WCAG 2.0 Success Criterion 2.2.5 − Re-authenticating

If a user is logged into a system, and his/her "session expires", he/she must be able to log in again without losing any of his/her previously entered data.

Before Rectification

A 4-step process of a user entering their contact details on the webpage and then reminded their session has expired halfway. Upon re-login, their details are not remembered on Step 4.

The example above shows a scenario where a user will lose his/her data, as the system has not remembered the user’s details at step 4.

After Rectification

On step 4, the details entered are remembered.

The correct technique is to ensure after the user logs in again, the data entered is not lost.

WCAG 2.0 Reference:

http://www.w3.org/TR/UNDERSTANDING-WCAG20/time-limits-server-timeout.html