What security level does age provide? (128bit / 256bit)

[adambvidex]

I want to make sure I'm understanding the age spec correctly. The File Key is 128bits. If the adversary knows the file key then they can decrypt your file, correct? So as a crypto-system we would say that age provides a 128bit security level? (Despite the fact that it uses a 256bit cipher).

[FiloSottile]

Yes, age file keys are 128 bits. The use of 256 bit ciphers lets us not worry about multi-target scenarios without a nonce.

Note that the concept of "security levels" is mostly outdated.