I am trying to learn PGP at CTF.
I want to encrypt messages with GPG (Linux command)
https://id0-rsa.pub/problem/19/
It is around the end of the site.
$echo "hello id0!" | gpg -e --armor
I don't know what to do after typing
How can I move on to the next problem?
Error message$gpg --import [file]
(Import PGP PUBLIC KEY)
$echo "hello id0!" | gpg -e --armor
You did not specify a user ID. (you may use "-r")
Current recipients:
Enter the user ID. End with an empty line:
came out.
I tried to enter my user ID many times, but it didn't work.
I don't understand the meaning of the last "End with an empty line".
root @ A: ~ # echo "hello id0!" | gpg -e --armor
You did not specify a user ID. (You may use "-r")
Current recipients:
Enter the user ID. End with an empty line: id0-rsa.pub
gpg: 8EA95EFADDF97CC6: There is no assurance this key belongs to the named user
sub rsa2048/8EA95EFADDF97CC6 2015-11-19 id0-rsa.pub (http://id0-rsa.pub)
Primary key fingerprint: AB3A 59D4 3681 1F98 5B9B F6EA 2503 D0F1 A81B 09D4
Subkey fingerprint: F7CC 71CA 795D 166B 1E1B 3E6C 8EA9 5EFA DDF9 7CC6
It is NOT certain that the key belongs to the person named
in the user ID.If i * really * know what i am doing,
you may answer the next question with yes.
Use this key anyway? (y/N) y
Even if I entered the other party's userID, I couldn't understand English, so I entered various things that seemed to be related, such as email addresses, but all died with the same result.
Supplemental information (FW/tool version etc.)VMware-KaliLinux
https://id0-rsa.pub/problem/19/
http://pgp.mit.edu/
-
Answer # 1
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The ID is specified just by giving a warning, so press enter to finish it.
Since the receiving user ID is unspecified, you are just told to specify it
If you are finished, you are just told to enter in the sky