OGR's S-57 reader can not decrypt this data even if you own it the IHO's technical committees are dominated (and often lead) by representatives of the established commercial vendors which have a vested interest in keeping the barrier to entry high.
These "DRM" tactics are fundamentally incompatible with almost all Free and Open Source software licenses (and goals) so there is little hope of a FOSS solution without action from higher up in the government. Even if they will sell you the data it will typically be encrypted in a form which will require one of their proprietary vendor-partners' software, OS, and typically a hardware dongle which can not be repaired or replaced at sea. If you live in a country so effected, probably the best you can do is have your local OSGeo chapter &/or institution complain en masse to your national geospatial information office, citing the United States's NOAA as an example which can not be ignored. MD5 checksums) have been around and in wide use for more than a decade, ensuring that the end-user's data has not been corrupted or altered, without requiring a closed system.
There are some justified worries about outdated or invalid data being used for navigational purposes, but in this sailor's opinion an out of date chart is worlds better than no chart at all money spent on fragile fail-dangerous software is money not spent of the upkeep of the boat we all know full well what "Not for navigational purposes" means (and that is mostly irrelevant for GIS work anyway) and cryptographically signed data packages (e.g. But for electronic charts the primary cost of production is shifted the maintenance of the bathymetric survey and light lists, which must be borne as a fixed cost anyway. This follows on from a tradition of selling paper charts, which did have substantial printing and distribution costs. The hydrographic offices of many countries, and their associates, earn significant revenue from selling nautical chart data back to the tax payers who funded them in the first place, and they are as a whole loathe to give that up. My frustrated take (rant?) on the matter: Often this is problematic, which is a real shame because lives depend - in a very real way - on universal access to good chart data.(see the mailing list posts linked at the end of that page): There is some more info and links on the Export for GpsDrive wiki page.4.3 QGIS S-52 plugin for viewing S-57 data.4.2 GRASS S-52 interface for rendering S-57 data.