SHA-1 gives 160-bit secure hash. Let's assume that a successful brute force attack is possible by trying 2^(160/3) combinations.
1 answer:
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Answer:
Here is the Python program:
def FewestCoinVals(): # function to output change using fewest coins
total_change = int(input('Enter change amount in pennies: '))
#prompts user to enter total change amount in pennies
if total_change <= 0: # if value of total_change is less or equal to 0
print('no change') # prints no change
else: # if value of total_change is greater than 0
dollars = total_change // 100
#calculate value of dollars by dividing total_change by 100
total_change %= 100 #take mod of value of total_change with 100
#calculate value of quarters by dividing total_change by 100
quarters = total_change // 25
total_change %= 25 #take mod of value of total_change with 25
#calculate value of dimes by dividing total_change by 100
dimes = total_change // 10
total_change %= 10 #take mod of value of total_change with 10
#calculate value of nickels by dividing total_change by 100
nickels = total_change // 5
total_change %= 5 #take mod of value of total_change with 5
pennies = total_change
#value of pennies is equal to value of total_change
#the if elif statement checks for the singular and plural coin names
if dollars >1:
print('dollars: ',dollars)
elif dollars ==1:
print('dollar: ',dollars)
if quarters > 1:
print('quarters: ',quarters)
elif quarters ==1:
print('quarter: ',quarters)
if dimes >1:
print('dimes: ',dimes)
elif dimes ==1:
print('dime: ',dimes)
if nickels >1:
print('nickels: ',nickels)
elif nickels ==1:
print('nickel: ',nickels)
if pennies >1:
print('pennies: ',pennies)
elif pennies ==1:
print('penny: ',pennies)
#calls the FewestCoinVals() function
FewestCoinVals()
Explanation:
The program prompts the user to enter change amount in pennies and has int() function to convert input value to integer. If the value entered is less than or equal to 0 it displays message "no change", otherwise it converts the value using fewest coins. The formulas for converting to each type is given in the code. It uses if and elif statements to check if the final value of total_change has singular or plural coin names such as penny or pennies. The program along with output is attached as the screen shot.
