This is the package signature as generated by The GnuPG. This signature identifies the party that created the package. By verifying it you are sure that the package coming from a trustworty person or organization.
Here is the package signature:
-----BEGIN PGP SIGNATURE----- iEYEABECAAYFAljzSHwACgkQqesEzEdeXBF0xgCfem0iREw/yO7un8cSVDC4udKH jJ0An088NCZtB+BxD49gUKmYLT4UT72a =EMZ8 -----END PGP SIGNATURE-----
You can save this signature in a text file (e.g. x265-2.3-i586-1gds.txz.asc) in the same directory where the package file (x265-2.3-i586-1gds.txz) resides and you can verify it by issuing the following command:
gpg --verify x265-2.3-i586-1gds.txz.asc
NOTE: You need to import the public key of SlackPack first:
gpg --import KEY