Another problem with rainbow tables is that their size depends on the password length, and with current technology they become impractical almost as soon as bru

Another problem with rainbow tables is that their size depends on the password length, and with current technology they become impractical almost as soon as brute forcing, and much sooner than smart dictionary attacks (e.g. hybrids where you take a dictionary and for each entry try every possible way to add 3 random characters).