Why is my iPad asking for a passcode after the latest update?

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iPad asking for passcode after latest update.

My mum has informed me that her ipad3 is asking for a 4digit passcode after the latest update. She has a 4digit code each time she uses her iPad but this code was not accepted when she tried it. Any clues as to what this code is????
 

Rob Phillips

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Re: iPad asking for passcode after latest update.

Welcome to iMore! It could either be the security passcode that she originally set or, if she uses Keychain (Settings > iCloud > Keychain) she may have set a PIN number for it.