201309162244 1mjpwt

partial decrypted manual

Two numbers, 6848584875 and 38.26701890000001. 3DES-CBC, key MD5(name), first block lost. Open: what they mean.

Metadata

Post ID: 1mjpwt
Title: 201309162244 → 2013-09-16 22:44 on A858's clock
Posted (UTC): 2013-09-17 02:44:13
Timezone: UTC−4 · title 22:44 against posted 02:44 UTC
Author: [deleted]
Account: A858DE45F56D9BC9 main account
Subreddit: r/A858DE45F56D9BC9 the main subreddit
Category: S solved 3DES → text
Content: Operational notes
Size: 80 hex characters · 40 bytes
Cipher: 3DES-EDE2 (two-key Triple DES), CBC, PKCS7
Key: MD5(A858DE45F56D9BC9) = 34a14a42e98ff96095af56604e290cae (name)
IV: 595D9292ABEDCF8A presumed: the IV was never published, so it is derived from a guessed first block (see the steps below)
Sources: community-archive, arctic-shift · body from community-archive
Links: Reddit · Arctic Shift · JSON
Score · comments: 3 · 1
Tags: automated (decryptable)2013Solved special postmanualkey: nameoperational notes

297FFD74B6CDFFD6 E6CE684A04BB64EB BBAB92AAB047A59F C67410CB4083F088 F99864AF99FD7A3C

Derive the key. Password = A858DE45F56D9BC9 (name); key = MD5(password) = 34a14a42e98ff96095af56604e290cae, used as a two-key 3DES key.
Decrypt. 3DES-EDE2 in CBC mode, then strip the PKCS7 padding.
Presumed IV. The IV was never published. Assuming the first 8 bytes are "-122.168", the start of a coordinate, the IV is D(C0) XOR that block = 595D9292ABEDCF8A. A presumed value, not a recovered one: every block after the first decrypts the same way whatever the IV is.

-122.1686848584875
38.26701890000001