I have the file mulibit.key (long string starting with U2FsdGVkX19E+pw) and password. Cannot find the Multibit Classic wallet to import the key and export to Electrum...

Tried to decrypt the key with

openssl enc -d -p -aes-256-cbc -a -in multibit.key -out key.txt -pass pass:Mypassword

but got only such response:

*** WARNING : deprecated key derivation used.
Using -iter or -pbkdf2 would be better.
iv =B6B2A8A90712B2393DDF8
bad decrypt
140404139345280:error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt:crypto/evp/evp_enc.c:588


The problem was different version of open ssl... After adding flag -md md5 my multibit.key get encrypted! So I could enter the private key into Electrum wallet

openssl enc -d -p -aes-256-cbc -md md5 -a -in multibit.key -out key.txt -pass 'pass:myPassword'

  • 1
    No. The links are not working any more...
    – oskar333
    Feb 16, 2021 at 21:14
  • Can you find the multibit classic ("Multibit") in your hard drive or should I send you my copy of Multibit 0.5.16? The former is better since it doesn't require that you trust me.
    – MCCCS
    Feb 17, 2021 at 9:11
  • 1
    Or you can download it from linux.softpedia.com/get/Office/Finance/MultiBit-102886.shtml . The file is multibit-0.5.18-linux.jar but it works on all operating systems
    – MCCCS
    Feb 17, 2021 at 9:24
  • It seems to me those links do work, they just redirect to a github repository for the source code to Multibit Classic. Feb 17, 2021 at 12:57
  • Thank you @MCCCS . Managed to decrypt the key without Multibit wallet :)
    – oskar333
    Feb 19, 2021 at 22:54

1 Answer 1


did you try the -md5 flag, the openssl decryption changed a few years back and the md5 flag should solve it

  • YES!! That did the job!! it was -md flag: openssl enc -d -p -aes-256-cbc -md md5 -a -in multibit.key -out key.txt -pass 'pass:myPassword'
    – oskar333
    Feb 19, 2021 at 12:17

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