Master PIN would still search and find in all vaults, but if we tried to use from a vault with PIN, we would need to type the additional pin. Use case: frequently log into a browser game and type pin without paying too much attention. Log into online bank with more care. Without an extra PIN to the bank vault, some onlooker could obtain the pin that would give access to sensitive and not so so sensitive logins.
Antonio
Master PIN would still search and find in all vaults, but if we tried to use from a vault with PIN, we would need to type the additional pin. Use case: frequently log into a browser game and type pin without paying too much attention. Log into online bank with more care. Without an extra PIN to the bank vault, some onlooker could obtain the pin that would give access to sensitive and not so so sensitive logins.