Pointâofâsale transactionsâi.e., swiping a card at the time of purchaseâsecurely encrypt the. credit card data. Cards placed on file for future transactions, such as for express checkâout, use. tokens to access card data.
The outermost layer of Earth is the atmosphere. I say the atmosphere is the outermost layer, because it is as much a part of the of our planet as the atmosphere of other planets is a part of their definition.
The Earths interior (University of Chicago). The crust is the outermost layer of the Earth; itâs a thin shell of rock that measures just 30 km thick at the continents, and 5 km thick underneath the oceans. Just 1% of the Earthâs mass is made up of its crust.