what is "sSecretKey"

[SARACEN]

I am doing version up.
I have several questions.

what is "sSecretKey" and how to get this?

I live other country so My English is the worst. I'm sorry. Thank you.

 

[Fraysa]

MapleStory uses AES-OFB (Advanced Encryption Standard using Output Feed Buffer) along with other custom encryptions for network packets.

To perform cipher, a secret key is used, which is the key you are referring to.

AFAIK you can obtain this from ZLZ.dll.