What is the "keychain" app on my Galaxy Nexus?

[CharlesJS]

Hi folks,

I'm relatively new to Android and this is my first post here, although I'm always hanging around picking up hints/tips/info. Samsung Galaxy Nexus ringtone download

I have a Samsung Galaxy Nexus (GSM) and recently installed Onavo to monitor my data usage as I only have 500mb on my plan. Whilst taking a look at what apps are using most of my data I noticed that, pretty high up the list, there is a system app called "keychain" which has used 9.2MB this month.
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Can anyone tell me a) what the app is and b) why it's using data? It's not really causing an issue in terms of me nearing my limit, I just have no idea what it's for. Any help is appreciated.

 

[Sajo]

If I understand everything I have read, Keychain is the process that let's Android store and use Trust Certificates and / or Trusted Credentials. Maybe the process since with the manufacturer or Google periodically and that's why it uses a little data?

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