Access Denied 1.2 CTF 2018: A Riddle to solve (Cryptography)

Challenge

“A coward dies a thousand times before his death, but the valiant taste of death but once. It seems to me most strange that men should fear, seeing that death, a necessary end, will come when it will come.”

Are you valiant enough to find the flag?

Download file from : https://accessd.sfo2.digitaloceanspaces.com/crypto50.txt

TAKE CARE OF CASE SENSITIVITY

Solution

The quote is from William Shakespeare’s Julius Caesar, so the Caesar cipher must be involved.

The content of the downloaded file is the following:

tvvxllwxgbxw{pX_TkX_UX_VHeExZx_tlwpYP}

Considering that the first letter must be an a, due to flag syntax, the rotation should be of 7 places (i.e. ROT7).

An on-line service can be used to obtain the flag:

accessdenied{wE_ArE_BE_COlLeGe_asdwFW}

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