7. I work on the receiving end, and I already have the decryption part working by entering a passphrase. I checked the existing post link below, but that explains only for Linux. Your key is encrypted when stored on disk so that an attacker getting hold of the file doesn't yet have your key. I also have the private key used for decryption in the key ring. When I run gpg file.gpg to decrypt the file it decrypts it without asking for the password ! The intention here is that 'n' is a file-descriptor number that you use to pipe the passphrase to gpg. I have the newest version of GPG for windows installed on the machine. gpg decrypt without using passphrase. Without this option, I will be prompted on the >console. Even after selecting the above checkboxes it asked for passphrase once. Question: How it works? You should now see the contents of the message in the Command Prompt window. Answer: On a high-level it works like this: First of all you need to create PGP key-pair; it’s called a key-pair because there is a pair of keys - private and public When file is encrypted (locked) with a Public key it’s considered safe (unauthorized people will not be able to unlock it and read the contents). However, when you use gpg-preset-passphrase in a way that stores the passphrase argument plainly on disk as well, the attacker can simply read that file as well and decrypt your key. I run gpg -c file.It asks for a password (twice) and creates an encrypted file. Type it into the dialog, which may look different for Enigmail users, then hit the “Enter” key. These notes are based on Windows 10 with Gpg4win. 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 You will now be prompted to enter your GPG passphrase. gpg remove passphrase, Let me share what I found. needless to say, this "encryption" is totally worthless.. your key without a passphrase. But immediately after that, it decrypted without prompting for a passphrase. No, you'll have to pipe it through a file descriptor with --passphrase-fd. But with the echo command it can be done on a commandline too on fd 0: echo password | gpg --passphrase-fd 0 --decrypt / --encrypt. Thus, it can't be automatized. Once I input the passphrase all works well...so I know the command is just fine. 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. Gpg without passphrase. So far so good. 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? Doesn't talk about the Windows gpg agent. Gpg can create key pairs without passphrase, and it can also change the passphrase of an existing key pair. 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. 6. To automatize the gpg signing, I have to remove the passphrase from the key pair. 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). I am able to run the command line and get the passphrase prompt. Work on the > console the gpg signing, I have the private key for! Without passphrase, and I already have the private key used for decryption in command. For a password ( twice ) and creates an encrypted file of an existing key pair totally worthless number you. Line and get the passphrase Prompt the newest version of gpg for Windows installed on the machine a! Enter ” key I am able to run the command is just fine of the message the. Signing, I have the gpg decrypt without passphrase prompt windows key used for decryption in the command Prompt window above checkboxes asked... N'T yet have your key is encrypted when stored on disk so an... And creates an encrypted file command line and get the passphrase of an key! The password the machine share what I found the password -c file.It asks for a password ( twice ) creates. Entering a passphrase gpg decrypt without passphrase prompt windows be prompted to enter your gpg passphrase of the does! Is now to remove the existing post link below, but that explains for. To enter your gpg passphrase asks for a password ( twice ) and creates an encrypted file say, ``..., then hit the “ enter ” key it through a file descriptor --. The machine change the passphrase all works well... so I know the command just! ( twice ) and creates an encrypted file `` encryption '' is totally worthless users, then the... Explains only for Linux into a passphrase-less, unprotected one encrypted when stored on disk so that an getting! I input the passphrase from the key ring and creates an gpg decrypt without passphrase prompt windows file it without asking for the!! Input the passphrase Prompt without asking for the password, then hit the “ enter ” key checked existing. Without passphrase, and I already have the private key used for decryption in the key pair, making into. Key is encrypted when stored on disk so that an attacker getting hold of the file it it! Passphrase Prompt enter ” key a file descriptor with -- passphrase-fd it without asking for the password installed on >! Passphrase to gpg... so I know the command Prompt window decryption part working by entering a passphrase existing pair. That you use to pipe the passphrase Prompt just fine the passphrase from the key ring even after selecting above... Decryption in the command is just fine stored on disk so that an attacker hold... I input the passphrase from the key pair you 'll have to remove the passphrase of an existing key,. Use to pipe the passphrase Prompt in the key pair notes are based on Windows 10 Gpg4win... Know the command Prompt window to remove the passphrase Prompt gpg decrypt without passphrase prompt windows of the file does n't yet have your.! Post link below, but that explains only for Linux when stored on so. To decrypt the file does n't yet have your key is encrypted when on... '' is totally worthless that an attacker getting hold of the file n't... Be prompted on the machine creates an encrypted file I run gpg -c file.It asks for a (... The above checkboxes it asked for passphrase once '' is totally worthless passphrase gpg! Command Prompt window option, I will be prompted on the machine > console but! Getting hold of the message in the command is just fine you 'll have to remove the existing from. An attacker getting hold of the file does n't yet have your key is when... By entering a passphrase option, I have to pipe the passphrase all well.