2fa
abbreviation
access
algorithms
alphabet
authentication
authorization
background
business
code
computer
confirm
confirmation
device
digit
digital
dynamic
factor
grass
green
industry
information
internet
key
letter
login
mail
mobile
network
number
one
online
only
otp
password
pin
privacy
protection
random
safety
security
sms
system
time
transaction
two
unique
valid
word