[WICKET-5443] Increase randomness and reduce predictability of CaptchaImageResource rendered images

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.12.0
• Fix Version/s: 6.13.0, 7.0.0-M1
• Component/s: wicket-extensions
• Assignee: Martin Tzvetanov Grigorov
• Reporter: Martin Tzvetanov Grigorov
• Created: 13/Dec/13 07:50
• Updated: 13/Dec/13 13:16
• Resolved: 13/Dec/13 13:16

Description

The generated image by CaptchaImageResource is predictable with the current usage of java.util.Random.
It can be improved by using SecureRandom.