Why all these hundreds of iMessage Sign In and key encryption keys?

Since el Capitan, upgrade of hundreds of iMessage Sign-In and encryption keys are listed. If I decide to delete one of them, a dialog box gives me a terrible warning.

Are these important, a security feature or just a pain?

Hello

Each cat to iMessages you is encrypted.

The keys are saved so that you can view the cats later if you save them.

The size of the key file is very small and even total not not worthy to be that barely thereon.

There are a couple of threads on this topic with some saying that they do not want to keep them now.

I'm not sure that someone tried to delete them and see if it looks an effects older cats.

21:09 Wednesday; 24 February 2016

 iMac 2.5 Ghz i5 2011 (Mavericks) 10.9
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro (Snow Leopard 10.6.8) 2 GB
 Mac OS X (10.6.8).
 a few iPhones and an iPad

Tags: Mac OS & System Software

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