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I have a service that checks my email regularly, and I use gpg to encrypt my email password. The problem is that every time I lock my computer or after a certain amount of time gpg shows a graphical interface to ask for the password.

Is there a way, even if it's less secure, to have gpg remember my password until I restart my computer? Or perhaps use my log-in password which I have to input anyways to unlock my computer? If that's not possible with gpg, is there another tool that can achieve this?

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    What about removing the password from your PGP private key. Even better, you can create a new PGP key-pair without a passphrase and use it only for this purpose; That way if the private key is stolen it could only be used to decrypt that one password. – Emmanuel Rosa Jan 22 at 9:27
  • That sounds like what I need. Can you provide me with some pointers on how to create a new key-pair without a passphrase? Thanks – Tohiko Jan 22 at 10:48
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    You can use gpg --quick-gen-key and simply press ENTER when asked for a passphrase. – Emmanuel Rosa Jan 23 at 11:36
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GPG can not directly be set to keep the password until restart, but you can change the time it caches the passwords to a very long time, e.g. a year. Add the following lines to $GNUPGHOME/gpg-agent.conf ($GNUPGHOME is usually ~/.config/gnupg):

default-cache-ttl 31536000
max-cache-ttl 31536000

This sets the time for caching passphrases to one year (31536000 seconds). default-cache-ttl is the normal caching time, which is reset when the key is used (so on each use it is cached longer), while max-cache-ttl limits the total time including extensions.

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