I was curious what iCloud Keychain (which I haven't explicitly stored any passwords in, yet) was storing, so I headed to Keychain Access. There I found an item I wasn't familiar with called
EscrowService, which appears to have a Date Modified of around the time I was updating to Mavericks:
Key escrow being very concerning (by definition, it is the storage of a key with a trusted third party), I disabled iCloud Keychain. The item remains in my
Local Items keychain, along with other items such as server passwords used by Mail.app and Wi-Fi keys.
Does anyone know what this item is for? I suspect if
com.apple.lakitu can be identified, it might be a step in the right direction, but I'm coming up short on searches.