Birthday Attack

Imaging That You Have A Hash Fuction, And It's Name Is "F", Now , f(value), If You Enter "a" As Value, For Example, It Returns "k", Now , There Is No Problem, But , The Problem Causes When Another Value Has The Same Result, For Example, If You Enter Value "z", The Function Again Returns "k", This Is Collision.

Birthday Attack Is A Type Of Cryptographic Attack And Based On Birthday Paradox, A Mathematic Subject, Birthday Attack Is Seems To Be A Kind Of Brute Force Attack, In Which, Attacker Trying To Find Two Different Inputs That Have The Same Output.

Now, The Attacker May Be Able To Bypass The Authentication Or Subvert It.

One Of The Most Famous Birthday Attack Vulnerability Is Tacacs+ Authentication Method.

In This Method, We Can See Two Different Sessions With The Same Session ID.