{
 "id": "je00i",
 "title": "201108091909",
 "title_time": "2011-08-09T19:09",
 "author": "[deleted]",
 "account": "A858DE45F56D9BC9",
 "subreddit": "A858DE45F56D9BC9",
 "created_utc": "2011-08-09T23:09:36Z",
 "permalink": "https://www.reddit.com/r/A858DE45F56D9BC9/comments/je00i/201108091909/",
 "arctic_shift": "https://arctic-shift.photon-reddit.com/api/posts/ids?ids=je00i",
 "sources": [
  "community-archive",
  "arctic-shift"
 ],
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 "body_source": "community-archive",
 "body_other_version": null,
 "body_hex_chars": 7802,
 "bytes": 3901,
 "score": 34,
 "num_comments": 34,
 "category": {
  "code": "S",
  "label": "S solved special"
 },
 "kind": "manual",
 "encryption": "unencrypted",
 "status": "solved",
 "summary": "A GIF whose changed bytes hold a short link, http://bit.ly/nLGwKt. Hex-encoded GIF89a.",
 "content_type": [
  "Banners and statements from A858 as itself"
 ],
 "cipher": null,
 "plaintext": null,
 "word_layer": null,
 "credit": null,
 "decoded_layers": null,
 "guids": null,
 "count_from_length": null,
 "run": null,
 "known_solution": [
  {
   "Method": "GIF steganography",
   "Result": "short message in changed GIF regions",
   "Explanation": "Verified",
   "Re-checked": "GIF steganography"
  }
 ],
 "tags": [
  "pre-automation",
  "2011",
  "Solved special post",
  "manual",
  "banners and statements from a858 as itself"
 ],
 "file": {
  "name": "je00i.gif",
  "type": "gif",
  "label": "GIF image",
  "mime": "image/gif",
  "bytes": 3901,
  "sha256": "cec7c0c711292ffa4fd2ac0944b6d74c4a5d157b11ad34f0fa6fb18b00acd376"
 },
 "stego": {
  "baseline": "jcm5f",
  "offset": 568,
  "length": 20,
  "changed": 20,
  "hex": "687474703A2F2F6269742E6C792F6E4C47774B74",
  "text": "http://bit.ly/nLGwKt",
  "nibble_text": null,
  "digest_of_name": false,
  "meaning": "A bit.ly short link."
 },
 "title_zone_hours": -4,
 "title_zone": "UTC−4",
 "writeup": {
  "title": "2011 GIF steganography",
  "markdown": "Status: **verified**. Three messages are checked against the community archive, and `jgxlk`'s against its Arctic Shift copy.\n\nThese five posts decode from whitespace-separated hexadecimal to GIF89a images of the same size. The first,\n[`jcm5f`](../jcm5f/), is the baseline. Each later image differs from it in one short, contiguous byte region, and\nthat region carries the message:\n\n| Post | Title | Hidden in the changed region |\n| --- | --- | --- |\n| [`je00i`](../je00i/) | `201108091909` | `http://bit.ly/nLGwKt` (as plain bytes) |\n| [`jf2zh`](../jf2zh/) | `201108101152` | `18033-3:2005` |\n| [`jgxlk`](../jgxlk/) | `201108121018` | the 16 bytes `34A14A42E98FF96095AF56604E290CAE` = MD5(`A858DE45F56D9BC9`) |\n| [`jlcv0`](../jlcv0/) | `201108170156` | `http://redd.it/jkuyr` |\n\n`je00i`'s URL and `jgxlk`'s digest sit in the changed bytes directly. The other two use the nibble-pair rule\n`((byte[i] & 15) << 4) | (byte[i + 1] >> 4)` over the changed region.\n\n`jgxlk` is not in the community archive; its body comes from Arctic Shift, and the digest was re-checked against\nthat copy. The same MD5 is the key of 550 posts, among them [`15cd8y`](../15cd8y/), and the digest itself turns up\nagain in the decrypted text of [`12yvg0`](../12yvg0/).\n\nThe findings page, with both ways of reading the bytes and the checks, is [2011 GIF posts](../../findings/gif-steganography/)."
 },
 "page": "posts/je00i/"
}