By downloading the data, you agree with the Terms and Conditions of the Challenge. All files are encrypted! To discompress the data, use the associated keys. Note, decryption keys are provided on Codalab after registration, based on the schedule of the challenge.
Decompressing the data: on Ubuntu, you can install 7zip and decompress the train data as follows:
$ sudo apt-get update
$ sudo apt-get install p7zip-full
$ 7z x train_set_vfbha39.zip.001
Encripted keys to decompress the data:
Train data: MdG3z6Eh1t