India, Sept. 3 -- The humble door lock is no longer limited to a key and a mechanical latch, as smart alternatives bring technology to one of the most basic aspects of home security. Fingerprints, PINs, smartphones and other access methods can make entering your home more convenient, but the appeal of a smart lock goes beyond simply replacing keys.

Security features, battery backup, emergency access and compatibility with your door can all determine how useful a lock proves in everyday life. At the same time, different households have different expectations, whether it is easier access for family members, greater control over who enters, or added peace of mind when away from home.

With several options competing on these fronts, this lis...