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authentication key
au·then·ti·ca·tion key (plural au·then·ti·ca·tion keys)


noun 
Definition:
 
code to verify parties in transaction: a code used by buyers and sellers in electronic transactions to check each other's identity
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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