Decrypt bitcoin wallet backup 

The manual backup files are encrypted using your chosen password. You can use OpenSSL to decrypt:

openssl enc -d -aes-256-cbc -a -in FILENAME


From:
https://github.com/schildbach/bitcoin-wallet/tree/master/wallet
 
openssl enc -d -aes-256-cbc -md md5 -a -in FILENAME
 
and then use wallet-tool from bitcoinj
 
Instruction:
https://github.com/bitcoin-wallet/bitcoin-wallet/blob/master/wallet/README.recover.md

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