Can t check signature public key not found

Question

I try to decrypt file using following command   gpg --output file txt --decrypt file pgp   File is decrypted successfully but i get an error       gpg  Can t check signature  public key not found    Any idea  why I get this error

User · Answer

There is a similar problem it is a tomcat digital signature     gpg --verify apache-tomcat-9 0 16-windows-x64 zip asc apache-tomcat-9 0 16-windows-  x64 zip gpg  Signature made 2019 02  5   0 32 50 gpg                 using RSA key A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 gpg  Can t check signature  No public key   but then I use the RSA key it provided to receive the public key to verify     gpg --receive-keys A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 gpg  key 10C01C5A2F6059E7  38 signatures not checked due to missing keys gpg  key 10C01C5A2F6059E7  public key  Mark E D Thomas  lt markt apache org gt   imported gpg  no ultimately trusted keys found gpg  Total number processed  1 gpg                imported  1   Then successfully     gpg --verify apache-tomcat-9 0 16-windows-x64 zip asc gpg  assuming signed data in  apache-tomcat-9 0 16-windows-x64 zip  gpg  Signature made 2019 02  5   0 32 50 gpg                 using RSA key A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 gpg  Good signature from  Mark E D Thomas  lt markt apache org gt    unknown  gpg  WARNING  This key is not certified with a trusted signature  gpg           There is no indication that the signature belongs to the owner  Primary key fingerprint  A9C5 DF4D 22E9 9998 D987  5A51 10C0 1C5A 2F60 59E7

User · Answer

You get that error because you don t have the public key of the person who signed the message     gpg should have given you a message containing the ID of the key that was used to sign it   Obtain the public key from the person who encrypted the file and import it into your keyring  gpg2 --import key asc   you should be able to verify the signature after that   If the sender submitted its public key to a keyserver  for instance  https   pgp mit edu    then you may be able to import the key directly from the keyserver    gpg2 --keyserver https   pgp mit edu  --search-keys  lt sender name or address gt

User · Answer

You need the public key in your gpg key ring   To import the public key into your public keyring  place the public key block in a text file with a  gpg extension  and then issue the following command   gpg --import  lt your-file gt  gpg   The entity that encrypted the file should provide you with such a block   For example  ftp   ftp gnu org gnu gnu-keyring gpg has the block for gnu org   For an even more in-depth explanation see Verifying files with GPG  without a  sig or  asc file

User · Answer

I got the same message but my files are decrypted as expected  Please check in your destination path if you could see the output file file

[encryption] Can't check signature: public key not found

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