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 exosphere, being the outermost layer of the atmosphere, is the approximate region where the density of gaseous molecules becomes indistinguishable from the âbackground levelsâ of molecules found in interplanetary space.