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{{Short description|Windows API for cryptography}}
'''Data Protection Application Programming Interface''' ('''DPAPI''') is a simple [[cryptography|cryptographic]] [[application programming interface]] available as a built-in component in [[Windows 2000]] and later versions of [[Microsoft Windows]] [[operating system]]s. In theory, the Data Protection API can enable symmetric encryption of any kind of data; in practice, its primary use in the Windows operating system is to perform symmetric encryption of asymmetric private keys, using a user or system secret as a significant contribution of entropy. A detailed analysis of DPAPI inner-workings was published in 2011 by [[Elie Bursztein|Bursztein]] et al.<ref>{{cite conference|last=Bursztein|first=Elie|last2=Picod|first2=Jean Michel|date=2010|title=Recovering Windows secrets and EFS certificates offline|book-title=WoOT 2010|publisher=Usenix|url=https://elie.net/publication/recovering-windows-secrets-and-efs-certificates-offline/}}</ref>
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