aty . ▁In ▁some ▁countries ▁it ▁is ▁not ▁illegal ▁to ▁use ▁de - scr amb ling ▁software ▁to ▁by pass ▁the ▁DVD ▁restrictions . ▁A ▁number ▁of ▁software ▁programs ▁have ▁since ▁appeared ▁on ▁the ▁Web ▁to ▁view ▁DVD s ▁on ▁a ▁number ▁of ▁different ▁platforms . ▁ ▁Other ▁measures ▁such ▁as ▁anti - ri pping , ▁as ▁well ▁as ▁U . S . ▁and ▁non - U . S . ▁copy right ▁law , ▁may ▁be ▁used ▁to ▁prevent ▁making ▁una ut hor ized ▁copies ▁of ▁DVD s . ▁CSS ▁dec rypt ing ▁software , ▁or ▁ri pping ▁software , ▁such ▁as ▁DVD ▁Dec ry p ter , ▁Any D VD , ▁Mac The R i pper , ▁and ▁DVD ▁S hr ink ▁allows ▁a ▁disc ▁to ▁be ▁copied ▁to ▁hard ▁disk ▁un sc ram bled . ▁Some ▁De CSS ▁applications ▁also ▁remove ▁Mac ro vision , ▁region ▁codes , ▁and ▁disabled ▁user ▁operations ▁( U OP s ). ▁ ▁Anti - ri pping ▁ ▁After ▁De CSS ▁ri pping ▁software ▁became ▁available , ▁companies ▁developed ▁techniques ▁to ▁introduce ▁errors ▁in ▁DVD - Video ▁disc s ▁that ▁do ▁not ▁normally ▁affect ▁play back ▁and ▁navigation ▁of ▁a ▁disc , ▁but ▁can ▁cause ▁problems ▁in ▁software ▁that ▁attempts ▁to ▁copy ▁the ▁entire ▁disc . ▁These ▁approaches , ▁which ▁are ▁not ▁part ▁of ▁the ▁official ▁DVD - Video ▁specification , ▁include ▁Sony ▁AR cc OS ▁Prote ction , ▁Mac ro vision ▁R ip Gu ard , ▁X - prote ct , ▁Prote ct Dis c