Brute Force Defense and History of IT Security

Cryptography Originating from Ancient Rome

The most widely known precursor in the history of cryptography is the Caesar cipher, used by Julius Caesar around 50 B.C. By shifting each alphabet letter by a certain rule (e.g., sliding three spaces down), this simple substitution cipher was revolutionary at the time. However, using modern computers—or even mere medieval 'frequency analysis'—the Caesar cipher can be cracked in less than a minute.

Computational Power that Destroyed Enigma

During World War II, the German army's supposedly impregnable cipher machine, 'Enigma', changed its configuration every midnight, yielding approximately 15 quintillion (10^16) possible combinations. It was uncrackable by human hands within a lifetime. However, a mechanical tool named 'Bombe', developed by genius mathematician Alan Turing, began to break down these combinations with the blistering speed of physical computation. This was the primitive ancestor of the modern 'Brute Force' attack.

Modern Hackers' Weaponry: Dictionary Attacks & Brute Force

In the modern landscape of cybersecurity, attacks distinctly manifest in two primary forms. First, the Dictionary Attack, which injects hundreds of millions of commonly used words (e.g., love, password, 123456) compiled into "dictionaries". If your password is an English word existing in a dictionary, your account will be compromised in seconds.

Second, the Brute Force Attack, which mobilizes specialized computer hardware (thousands of GPUs connected in parallel) to blindly inject every imaginable string from 'a' to 'ZZZZZZZZ'.

"A secure password is not a memorable phrase, but a random string harboring infinite permutations that force even machines to abandon calculation." - Cybersecurity Proverb

Mathematical Cosmology: The Threshold Hackers Abandon

The length of a password inflates computational workload 'exponentially'. If you use only lowercase English letters, an 8-character password yields 26^8 (about 200 billion) combinations. But if you mix uppercase, lowercase, special symbols, and numbers to craft a 16-character password, the available characters bloom to 94, skyrocketing the permutations to 94^16 (approx 3.7 x 10^31).

Even if a state-of-the-art supercomputer tests tens of trillions of possibilities per second, processing these combinations would take hundreds of millions of years—far longer than it takes for the sun to exhaust its fuel and swell into a red giant. This is the mathematical beauty of random arrays that single-handedly paralyzes hackers' computing prowess.