A858DE45F56D9BC9 archive

201112281637 nu9gx

solved decrypted manual

A '#' banner in ASCII art. 3DES, key MD5(0000DE45).

Metadata

Post ID
nu9gx
Title
201112281637 → 2011-12-28 16:37 on A858's clock
Posted (UTC)
2011-12-29 00:33:34
Timezone
UTC−8 · title 16:37 against posted 00:33 UTC
Author
[deleted]
Account
A858DE45F56D9BC9 main account
Subreddit
r/A858DE45F56D9BC9 the main subreddit
Category
S solved special
Content
Banners and statements from A858 as itself
Size
1,072 hex characters · 536 bytes
Cipher
3DES-EDE2 (two-key Triple DES), ECB, PKCS7
Key
MD5(0000DE45) = 68c0bf44a604433c859df970a4a29f72 (sidebar value)
Sources
arctic-shift · body from arctic-shift
Links
Reddit · Arctic Shift · JSON
Score · comments
13 · 3
Tags
pre-automation2011Solved special postmanualarctic-onlykey: sidebar valuebanners and statements from a858 as itself

From the post to its content

As posted (encrypted)

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
  • Derive the key. Password = 0000DE45 (sidebar value); key = MD5(password) = 68c0bf44a604433c859df970a4a29f72, used as a two-key 3DES key.
  • Decrypt. 3DES-EDE2 in ECB mode, then strip the PKCS7 padding.

Decrypted

.##....##..#######......#######......######...#######..########.....###...
.###...##.##.....##....##.....##....##....##.##.....##.##.....##...##.##..
.####..##.##.....##...........##....##.......##.....##.##.....##..##...##.
.##.##.##.##.....##.....#######......######..##.....##.########..##.....##
.##..####.##.....##....##.................##.##.....##.##........#########
.##...###.##.....##....##...........##....##.##.....##.##........##.....##
.##....##..#######.....#########.....######...#######..##........##.....##

Explanation

Solution summary

Method
3DES-ECB, key MD5(0000DE45)
Result
'#' banner ASCII art
Explanation
Recovered
Re-checked
3DES MD5("0000DE45") -> banner

Related

Findings: Sidebar values