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Dec 4: Crypto 01
Challenge
a classic / simple one
Unfortunately, no one can be told what this is. You have to see it for yourself.
1
HOlAfOVWOqVd1o6q7u5Vj8Mv-----
Solution
The string is exactly the length of a nugget, all the characters for HV15 are there as well as the 5 dashes. Maybe we just need to rearrange the characters somehow? We notice that the characters to form “HV15” are always 6 apart, so we create a grid:
1
2
3
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5
HOlAfO
VWOqVd
1o6q7u
5Vj8Mv
-----
reading this top-to-bottom and left-to-right gives the nugget
Flag
HV15-OWoV-lO6j-Aqq8-fV7M-Oduv