Q. Is it permitted to have security cameras inside a shul? Do you have to inform the attendants that they are being taped?
A. In our times it is common to have security cameras outside the shuls, schools and other community institutions, as is common in businesses and private homes.
Horav Shlomo Miller's Shlit'a opinion is that it is permitted to have them inside a shul also, when needed for the security or the safety of the attendants, and with the agreement of the leaders of the shul. However, the Rov recommends that they should be disconnected during Shabbos when possible.
The Rov also maintains that the people of the shul should indeed be informed that there are now security tapes taping them constantly.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a