KT digital item simple encryption poc See also python impl with pre processed xor key. https://www.reddit.com/r/ReverseEngineering/comments/2m7ylm/i_have_a_webp_file_which_is_encoded_somehow_could/ Preproccessed xor cipher key (base64 encoded below) 561CWxbxgRlmQjxEZ41EuE5YHOnD2hxQR0zvUEqLwMs/EbPkNHCgeqOuLFtLEcMBI36CWUwdw80B0hwja+OftrIuYNenqf6eP7pYXWTxoIIUbFey/ZoSSU04X9KQb/ybjcvFfrcMAVd9I05PvUiEA5RRaCn4z0tLOkMYVgg94ow=