Cisco does not provide or support a "license key generator" for the
To legally obtain or upgrade a license (such as Security Plus or 3DES/AES encryption) for a Cisco ASA 5505 , follow these steps: Retrieve Device Information show version command on your ASA to find its Serial Number Purchase/Redeem a PAK : You must have a Product Activation Key (PAK) cisco asa 5505 license key generator
Enter your PAK and the ASA's serial number to generate a unique Activation Key Cisco will email the final license key to you. Cisco Community Applying the License Key Cisco does not provide or support a "license