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The Advanced Encryption Standard (AES) is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001. The algorithm described by AES is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data.

AES in Bitcoin[edit]

AES encryption is used for encrypting the wallet.dat file used in the original bitcoin client. This wallet uses AES-256-CBC to encrypt only the private keys that are held in a wallet.

AES in Trezor[edit]

Trezor Wallet uses AES during saving metadata and it is also used during saving account details in Password manager.

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