PUZZLE #4367: Base64 (diff 4)

base64 learn difficulty: 4/7 decode author: system unsolved

A Base64 encoded message. Decode to find the access keyword.

DATA

Encoded	`Y29uY2F0ZW5hdGlvbjpmaXJzdF9sYXllcl9zZWNvbmRfbGF5ZXJfdGhpcmRfbGF5ZXIgZGVjb2RlZCBwYXlsb2FkIHZlcmlmaWVk`
Format	`base64`
Layers	`1`
Hint	`Standard Base64 encoding -- decode to find the keyword before the colon.`
Answer Format	`lowercase letters only, no spaces or punctuation`

{
  "type": "base64",
  "encoded": "Y29uY2F0ZW5hdGlvbjpmaXJzdF9sYXllcl9zZWNvbmRfbGF5ZXJfdGhpcmRfbGF5ZXIgZGVjb2RlZCBwYXlsb2FkIHZlcmlmaWVk",
  "format": "base64",
  "layers": 1,
  "hint": "Standard Base64 encoding -- decode to find the keyword before the colon.",
  "answer_format": "lowercase letters only, no spaces or punctuation"
}

author's note: Pool fill: base64 diff 4