“Licensed” and “secure” describe different parts of a casino. Licensing identifies an authority and a set of obligations; security concerns the protection of accounts, data, payments, and games. A careful Argentine player should verify both rather than treating either word as a marketing label.
Argentina does not have one national casino licence
Online gambling is regulated at provincial level, so rules and authorised operators vary by location. Check the relevant local authority and whether the site may accept residents of your province. An international licence can be meaningful, but it does not automatically settle local eligibility.