Yes, I see that.
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.
Why, then, the subject error message?
On Sat, Apr 15, 2023 at 3:37 PM Todd Zullinger via Gnupg-users <
gnupg-users@gnupg.org> wrote:
> Mike Schleif wrote:
> > $ gpg --version
> > gpg (GnuPG) 2.0.22
> > libgcrypt 1.5.3
> >
> > $ cat /etc/system-release
> > CentOS Linux release 7.9.2009 (Core)
>
> Algorithm 18 is ECDH, which is not supported by gpg on
> CentOS 7. You can confirm this in the Pubkey line of the
> gpg --version output:
>
> $ gpg --version
> gpg (GnuPG) 2.0.22
> libgcrypt 1.5.3
> [...]
>
> Home: ~/.gnupg
> Supported algorithms:
> Pubkey: RSA, ?, ?, ELG, DSA
> Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
> CAMELLIA128, CAMELLIA192, CAMELLIA256
> Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
> Compression: Uncompressed, ZIP, ZLIB, BZIP2
>
> On a newer Fedora system, ECDH is present:
>
> $ gpg --version --no-copyright
> gpg (GnuPG) 2.4.0
> libgcrypt 1.10.1-unknown
> [...]
>
> Home: /home/user/.gnupg
> Supported algorithms:
> Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
> Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
> CAMELLIA128, CAMELLIA192, CAMELLIA256
> Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
> Compression: Uncompressed, ZIP, ZLIB, BZIP2
>
> --
> Todd
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