New Delhi, June 16 -- Union home minister Amit Shah on Sunday reviewed preparations for the Census, for which a formal notification will be issued on Monday, the Union home ministry said, while reiterating that the upcoming exercise will have the option of self-enumeration. The ministry further said that Census 2027 will be conducted through digital means and that very stringent data security measures would be put in place to ensure data security at the time of collection, transmission and storage. The MHA said that about 3.4 million enumerators and supervisors as well as and around 130,000 census functionaries would be deployed for the exercise. The government had, last week, announced that the much-delayed Census exercise, which will incl...