NameMasker 
Name masker is a gem for masking first name and last name.
Installation
Add this line to your application's Gemfile:
gem 'name_masker'And then execute:
$ bundle
Or install it yourself as:
$ gem install name_masker
Usage
name_masker gem has 5 commands:
first_name = 'Lorem'
last_name = 'Ipsum'
puts NameMasker.mask_first_name(first_name)
# Lo***
puts NameMasker.mask_last_name(last_name)
# ***um
puts NameMasker.mask(first_name, last_name)
# Lo*** ***um
puts NameMasker.mask_email('sadie@casperoberbrunner.co')
# '*a***@c***'
puts NameMasker.mask_phone_number('1', '2025550132')
# +12*******32