<div dir="ltr"><div dir="ltr">Yes, I see that.<br><br>However, our public key was generated by our GPG; and this file is encrypted with our public key, since there is NO missing "secret key" error.<br><br>Why, then, the subject error message?<br></div><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Apr 15, 2023 at 3:37 PM Todd Zullinger via Gnupg-users <<a href="mailto:gnupg-users@gnupg.org">gnupg-users@gnupg.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Mike Schleif wrote:<br>
> $ gpg --version<br>
> gpg (GnuPG) 2.0.22<br>
> libgcrypt 1.5.3<br>
> <br>
> $ cat /etc/system-release<br>
> CentOS Linux release 7.9.2009 (Core)<br>
<br>
Algorithm 18 is ECDH, which is not supported by gpg on<br>
CentOS 7. You can confirm this in the Pubkey line of the<br>
gpg --version output:<br>
<br>
$ gpg --version<br>
gpg (GnuPG) 2.0.22<br>
libgcrypt 1.5.3<br>
[...]<br>
<br>
Home: ~/.gnupg<br>
Supported algorithms:<br>
Pubkey: RSA, ?, ?, ELG, DSA<br>
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,<br>
CAMELLIA128, CAMELLIA192, CAMELLIA256<br>
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224<br>
Compression: Uncompressed, ZIP, ZLIB, BZIP2<br>
<br>
On a newer Fedora system, ECDH is present:<br>
<br>
$ gpg --version --no-copyright<br>
gpg (GnuPG) 2.4.0<br>
libgcrypt 1.10.1-unknown<br>
[...]<br>
<br>
Home: /home/user/.gnupg<br>
Supported algorithms:<br>
Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA<br>
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,<br>
CAMELLIA128, CAMELLIA192, CAMELLIA256<br>
Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224<br>
Compression: Uncompressed, ZIP, ZLIB, BZIP2<br>
<br>
-- <br>
Todd<br>
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</blockquote></div><br clear="all"><div><br></div><div dir="ltr" class="gmail_signature"><div dir="ltr"></div></div></div>