Once the algorithm is understood (e.g., specific math, hashing, or byte manipulation), the keygen writes a new program that performs this algorithm in reverse to generate valid keys.
If a serial key is just a simple obfuscated version of the user ID (e.g., using Base64), it is easy to reverse. Serials Keygen Crack
If the software does not check a live server to validate the key, it is highly susceptible to offline keygen generation. Once the algorithm is understood (e
Many serial keys are generated using a specific format or structure, such as XXXX-XXXX-9999-9999-XXXX , which the keygen must emulate. Once the algorithm is understood (e.g.