Why is the vigenere cipher hard to crack? (select 2)

a. one cannot solve using frequency analysis directly.
b. the key length is variable and potentially very long
c. the key is always secret to both the sender and receiver of the message.
d. a vigenere cipher relies upon an "alphabet shift" algorithm.

The database design steps are listed below in the incorrect order. choose the correct order number next to each step. determine the information to be stored in the database. determine the fields needed to record the data determine if there will be any repetition of data entered, and separate the fields into tables to normalize the data. create relationships to connect the tables.

Write python code that prompts the user to enter his or her age and assigns the user’s input to an integer variable named age.

Which device has the most limited computing functionality?