2017 HXP CTF writeup
| Name | Category | Points | Solves |
|---|---|---|---|
| flea | CRYPTO | 100 (static) + 20 (dynamic) | 15 |
please hack!
See attachments.
See solutions.
| Name | Category | Points | Solves |
|---|---|---|---|
| ouchenticated | CRYPTO | 100 (static) + 4 (dynamic) | 62 |
Nobody ain’t need no proper crypto!
nc 35.198.105.111 32773
See attachments.
See solutions.
| Name | Category | Points | Solves |
|---|---|---|---|
| drm | CRYPTO | 200 (static) + 50 (dynamic) | 6 |
Finally a safe DRM system. Extract the key. Flag: hxp{[0-9a-f]{32}}
See attachments.
See solutions.
| Name | Category | Points | Solves |
|---|---|---|---|
| notsosmart | CRYPTO | 300 (static) + 200 (dynamic) | 3 |
Consider this my revenge for all the ciphertext-only CTF challenges I had to stare at in all those years. gl&hf!
nc 35.205.206.137 29292
See attachments.
See solutions.
| Name | Category | Points | Solves |
|---|---|---|---|
| 4ES | CRYPTO | 350 (static) + 150 (dynamic) | 3 |
Who says AES can’t be lightweight?
nc 35.198.105.111 1077
See attachments.
See solutions.
| Name | Category | Points | Solves |
|---|---|---|---|
| categorical | CRYPTO | 500 (static) + 100 (dynamic) | 0 |
Here’s my categorical imperative: Find a collision!
(I bet you Kant do it Immanually!)
nc 35.198.98.140 17731
See attachments.
See solutions.
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