Cisco provides the 3DES/AES license for free . You can still request these via the Cisco Software Central portal. As long as the serial number isn't flagged, Cisco will email you the activation key legally.
Downloading legacy "keymakers" or "activators" from the open web today is extremely risky. Most files hosted under these names on shady forums are now "wrappers" for . Since these tools require administrative privileges to run, they are a primary vector for infecting a network admin's workstation. How to Properly License a Cisco ASA Today
The era of the "SSG Keymaker" has largely passed for three primary reasons: 1. The Shift to Smart Licensing
Unlike complex cracks, it was a standalone executable that required only the hardware serial number.