It's my understanding that RAR has some kind of built in data recovery like PAR and I believe had better encryption support early on. IIRC traditional zip encry

It's my understanding that RAR has some kind of built in data recovery like PAR and I believe had better encryption support early on. IIRC traditional zip encryption was kind of a joke, maybe it was neutered to comply with the export restrictions from the 90s. Spanning is old as dirt, I remember doing it with pkzip and floppies so I don't think it is something unique to RAR.