How many shared keys are required for a company of 70 employees?

In a company of 70 employees, the number of shared keys required for secure communication depends on the key management system in use. If each employee needs a unique key to communicate securely with every other employee, the total number of shared keys can be calculated using the formula for combinations: ( C(n, 2) = \frac{n(n-1)}{2} ), where ( n ) is the number of employees. For 70 employees, this results in ( C(70, 2) = 2,415 ) unique shared keys. However, if a different key management approach is utilized, such as hierarchical key management or group keys, the number of keys may be significantly reduced.