akamai.java

String getRandomTwoLetterHexDigest(UUID timebased) {
  checkArgument(timebased.version() == 1);
  long timestamp = UUIDs.unixTimestamp(timebased);
  ByteBuffer buffer = ByteBuffer.allocate(8);
  buffer.putLong(timestamp);
  // could add clocksequence as well 
  byte[] digest = DigestUtils.getSha256Digest().digest(buffer.array());
  return String.valueOf(Hex.encodeHex(digest)).substring(0, 2);
}

// Examples timebased = UUID.fromString("8afafee0e29f11e49f85bbf692fcdb71") -> "bb"