“secure”

19 symbols from Material Design Icons

lock

account-lock

book-lock

email-lock

home-lock

image-lock

lock-check

lock-outline

message-lock

plus-lock

send-lock

timer-lock

account-lock-outline

book-lock-outline

email-lock-outline

image-lock-outline

lock-check-outline

message-text-lock

timer-lock-outline