The goal is now to remove the existing passphrase from the key pair, making it into a passphrase-less, unprotected one. Hi all, I'm working on this project, wherein a gpg-encrypted file is being generated and transmitted from one end and is being received and processed on another end. Type it into the dialog, which may look different for Enigmail users, then hit the “Enter” key. Your key is encrypted when stored on disk so that an attacker getting hold of the file doesn't yet have your key. To automatize the gpg signing, I have to remove the passphrase from the key pair. When I run gpg file.gpg to decrypt the file it decrypts it without asking for the password ! If you are trying to decrypt a file or a bunch of files using batch file in windows you will write something like this: gpg --pinentry-mode=loopback --batch --yes --passphrase "abc%123" --decrypt-files *.pgp Thus, it can't be automatized. I am able to run the command line and get the passphrase prompt. gpg decrypt without using passphrase. The intention here is that 'n' is a file-descriptor number that you use to pipe the passphrase to gpg. I checked the existing post link below, but that explains only for Linux. 6. Gpg can create key pairs without passphrase, and it can also change the passphrase of an existing key pair. your key without a passphrase. I run gpg -c file.It asks for a password (twice) and creates an encrypted file. I thought I might share in case there is another lost soul In the bash shell, gpg2 --batch --gen-key < seems to work fine for removing a passphrase. >encryption or decryption? You should now see the contents of the message in the Command Prompt window. needless to say, this "encryption" is totally worthless.. But immediately after that, it decrypted without prompting for a passphrase. So far so good. Even after selecting the above checkboxes it asked for passphrase once. I also have the private key used for decryption in the key ring. gpg remove passphrase, Let me share what I found. I have the newest version of GPG for windows installed on the machine. I work on the receiving end, and I already have the decryption part working by entering a passphrase. 7. Gpg without passphrase. gpg --batch --passphrase-fd 0 --output "myoutput" --decrypt "myencryptedfilename" < echo mypassphrase Note: the batch option is required to not have the UI prompt come up. Question: How it works? No, you'll have to pipe it through a file descriptor with --passphrase-fd. These notes are based on Windows 10 with Gpg4win. For example, you could do something like this in shell: cat passphrase-file | gpg --passphrase-fd 0 This would place the contents of the passphrase-file on gpg's stdin (fd=0). But with the echo command it can be done on a commandline too on fd 0: echo password | gpg --passphrase-fd 0 --decrypt / --encrypt. You will now be prompted to enter your GPG passphrase. 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