Write Up CTF Fit Competition UKSW 2016 - CRYPTOGRAPHY [ Sudah Tua ]

Mission Decode dari hash berikut :

Vm0wd2QyVkZOVWhTYmxKWFlURndUMVpzWkc5V2JGbDNXa2M1V0ZadGVIbFdNalZyVmx
VeFYySkVUbGRpVkVaSVZtMXplRll5U2tWVWJHaG9UV3N3ZUZadE1UUlRNbEpJVm10V1VtS
kdXbkJWYlhoV1pVWmFjbHBJY0d4U2JHdzFWa2QwWVZsV1NuUmhSemxWVm0xb1JGWldXb
HBsUm1SMFpFWlNUbFpVVmtwV2JHUXdWakZhZEZOclpHcFNWR3hoV1d4b1UxUkdXWGhY
YlhSWFRWaENSbFpYZUZkVWJGcFlaSHBDVjJFeVRYaFZha1poVTBaT2MxZHNhR2xoTUhCW
VYxZDBZV1F4V1hoVmJHUllZbFZhV0ZsclpGTmxWbGw1WlVWT1YwMXJWak5aTUZwVFZqRmFWMk5HVG1GU1JWcEVWbGQ0UTFaVk1VVk5SREE5

Di analisa didapatkan bahwa hash tersebut merupakan hash base64, coba di lakukan decode base 64.

# echo Vm0wd2QyVkZOVWhTYmxKWFlURndUMVpzWkc5V2JGbDNXa2M1V0ZadGVIbFdNalZyVmxVeFYySkVUbGRpVkVaSVZtMXplRll5U2tWVWJHaG9UV3N3ZUZadE1UUlRNbEpJVm10V1VtSkdXbkJWYlhoV1pVWmFjbHBJY0d4U2JHdzFWa2QwWVZsV1NuUmhSemxWVm0xb1JGWldXbHBsUm1SMFpFWlNUbFpVVmtwV2JHUXdWakZhZEZOclpHcFNWR3hoV1d4b1UxUkdXWGhYYlhSWFRWaENSbFpYZUZkVWJGcFlaSHBDVjJFeVRYaFZha1poVTBaT2MxZHNhR2xoTUhCWVYxZDBZV1F4V1hoVmJHUllZbFZhV0ZsclpGTmxWbGw1WlVWT1YwMXJWak5aTUZwVZqRmFWMk5HVG1GU1JWcEVWbGQ0UTFaVk1VVk5SREE5 | base64 -d

Hasil dari decode adalah sebuah bas64 lagi, lagi, lagi dan lagi -_- ... oke coba decode hingga
didapakatkan flagnya flag:

Flag : FIT2016{0Ld_cRypto}