There are several secondary structure prediction algorithms. I am interested in the algorithms which predict secondary structure without accessing the PDB to cheat by using the DSSP or STRIDE entry for known homologous structures.
Since DSSP and STRIDE are not performing predictions, rather they analyse the PDB structure to determine whether each residue is a helix, strand or coil. This in turn means that, the 'so called' secondary structure prediction algorithm, also, is not performing predictions (except, of course, in the cases where no homologous structure/sequence is found in the PDB).
Which secondary structure prediction algorithms don't cheat by using DSSP or STRIDE for homologous structures?
Here is a list of secondary structure prediction algorithms, which are accessible via a consensus secondary structure prediction server called @NPS (currently down: https://npsa-prabi.ibcp.fr/NPSA/npsa_seccons.html)
DPM DSC GOR1 GOR3 HNN MPSA PHD PREDA SOPM