EAC system with plurality of different algorithm/operand pairs having different functionality

An electronic access control system, comprising:

• at least one processor having associated memory;
• an actuator that unlocks a closure for an opening in response to one or more signals from the processor;
• a user input device that receives user input and communicates to the at least one processor data corresponding to the user input;
• the memory having stored thereon code causing the at least one processor to:
• receive an entered code via the user input device;
• calculate a first calculated code using a first algorithm/operand pair, and compare the first calculated code to the entered code to determine if the first algorithm/operand pair matches the entered code;
• and
• if the first algorithm/operand pair matches the entered code, perform a first EAC function;
• and
• if the first algorithm/operand pair does not match the entered code, one of:
• (a) compare to the entered code a previously determined second calculated code that was calculated using a second algorithm/operand pair to determine if the second algorithm/operand pair matches the entered code;
• and
• (b) calculate a second calculated code using a second algorithm/operand pair, and compare the second calculated code to the entered code to determine if the second algorithm/operand pair matches the entered code;
• and
• if the second calculated code matches the entered code, perform a second EAC function that is different from the first EAC function;
• and
• wherein the first algorithm/operand pair comprises a cryptographic algorithm and a first operand and the second algorithm/operand pair comprises the same cryptographic algorithm and a second operand that is different from the first operand;
• and
• wherein the actuator comprises one of (a) an actuator selected from the group of a motor, solenoid, and electromagnet that unlocks one of a latch, shackle, door, building door, locker door, cabinet door, gate, locker, cabinet, or drawer and (b) an actuator selected from the group of a motor and a solenoid that releases one of a pin, catch, of flange that is affixed to a door, building door, drawer, locker door, or cabinet door to unlock or permit manual unlocking thereof.