India needs to build its own technology systems—everything from computers to the software we use every day—because relying on foreign-made tech could put the country at serious risk, according to experts.

Recently, a tragic event in Lebanon highlighted the dangers of technology in warfare. A coordinated attack using modified pagers resulted in the deaths of nine people and left over 2,800 injured, many of them seriously. The attack targeted Hezbollah, a powerful political and military or...