The hint says it's an "advanced" encryption so let's try AES:

[https://gchq.github.io/CyberChef/#recipe=AES_Decrypt(%7B'option':'Hex','string':...](https://gchq.github.io/CyberChef/#recipe=AES_Decrypt(%7B'option':'Hex','string':'B55D3CE3183E06928%20BA82F8980B661A30A%206C4B2BA499062CF6A%2031EB1CD581E55'%7D,%7B'option':'Hex','string':'00%2001%2002%2003%2004%2005%2006%2007%2008%2009%200a%200b%200c%200d%200e%200f'%7D,'CBC','Hex','Raw',%7B'option':'Hex','string':''%7D)&input=ZGYgNDggYjggNmUgMTQgODcgZjYgOGIgYTggOWMgMmMgYzggZDMgMmIgZWMgNzMgMDYgMDEgMGEgMDEgZTIgNzUgMjYgZmUgMzggZDUgNjcgNTkgZTYgNTUgMzMgYjIgYWEgZTAgMmQgNjcgMzQgNDggN2QgNTIgOGEgMTggMGQgMzYgZDcgZjIgMTggOGY)

Flag: `CYCTF{wh0_kn3w_yU0_w3r3_sO_sm@r7}`