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+[Back to 2 Operable index](index.md)
+
+# 2.2.5 Re-authenticating
+
+- Level: AAA
+- Guideline: 2.2 Enough Time
+- Principle: 2 Operable
+
+## What it is
+
+When an authenticated session expires, the user can continue the activity without loss of data after re-authenticating.
+
+## How to test
+
+- Check: When an authenticated session expires, the user can continue the activity without loss of data after re-authenticating.
+- Use the sufficient techniques below as acceptable methods when applicable.
+- Confirm none of the common failures apply.
+
+## Sufficient techniques (W3C)
+
+- G105: Saving data so that it can be used after a user re-authenticates
+- G181: Encoding user data as hidden or encrypted data in a re-authorization page
+
+## Common failures (W3C)
+
+- F12: Failure of Success Criterion 2.2.5 due to having a session time limit without a mechanism for saving user's input and re-establishing that information upon re-authentication
+
+## Resources
+
+- WCAG 2.2 SC: https://www.w3.org/TR/WCAG22/#re-authenticating
+- Understanding: https://www.w3.org/WAI/WCAG22/Understanding/re-authenticating.html
+- Quick reference: https://www.w3.org/WAI/WCAG22/quickref/?versions=2.2#re-authenticating
+
+[Back to 2 Operable index](index.md)