Hacker missed what's in Grace Tseng's picture 駭客忽略了曾格爾照片裡的

 

作者：蔡日興

Technically we know this GPS track she made public is extremely likely hacked. 

從技術上講，我們知道她公布這個GPS軌跡極度可能是被駭過的。

(1) The elevation field of this GPS track is extremely stable. But Garmin inreach mini on her shoulder strap does not have a barometer and therefore severe fluctuation in elevation is expected.

(1) 這條GPS軌跡的海拔欄位是非常穩定的。但她肩帶上的Garmin inreach mini並沒有氣壓計，因此海拔的嚴重波動是可以預期的。

(2) And according to the time span, there should be theoretically 709 points. But the signal miss rate of this GPS track is so high that only 231 points are left. This is very unusual since there is no obstacle toward the sky.

(2) 而根據時間跨度，理論上應該有709個點。但是這個GPS軌跡的信號失誤率非常高，只剩下231個點。這是很不尋常的，因為沒有朝向天空的障礙物。

(3) The points left even showed some regularity in time spacing. This is unusual and is a signature of hacking.

(3) 留下的點甚至在時間間隔上顯示出一些規律性。這是不尋常的，是被駭過的特徵。

(4) There is "Batt" field in every point of this GPS track. But infact Garmin inReach mini 2 would occasionally skip it. This constant existence of "Batt" field lasting whole 23:36 timespan is therefore a signature of hacking.

(4) 在這個GPS軌跡的每個點上都有 "Batt "欄位。但事實上，Garmin inReach mini 2偶爾會跳過它。因此，這種在整個23小時36分的時間段內，持續存在的 "Batt "欄位，是資料被駭客修改後的跡象。

(5) The time spacing of this GPS track is fixed multiple of two minutes during whole 23:36 time span. But infact Garmin inReach mini 2 would occasionally skip extra time in multiple of 15 seconds. This constant time spacing is therefore a signature of hacking.

(5) 在整個23:36的時間範圍內，這個GPS軌跡的時間間隔都是固定的兩分鐘的倍數。但事實上，Garmin inReach mini 2偶爾會額外跳過15秒的倍數。因此，這種恆定的時間間隔是資料被駭客修改後的跡象。

But such evidence is very difficult to explain to general public.

但這種證據很難向公眾解釋。

What general public do understand is that one man is moving or standing still. You can tell from this picture taken before this record-breaking attempt. The picture was taken at 18:19. But the likely hacked GPS track reported that she is moving between 18:18:45 and 18:20:45. She climbed up 8 meters and moved 65 meters during this time span.

一般人所理解的是，一個人在移動或站立不動。你可以從這張在破紀錄行程出發前拍攝的照片看出。這張照片是在18:19拍攝的。但是，可能被駭過的GPS軌跡顯示，她在18:18:45和18:20:45之間移動。她在這個時間段內爬升了8米，移動了65米。

Some might argue that she could just take this picture and start running immediately. But you know this is extremely unusual. Normally if this picture is taken with our own phone, we will take off the gloves and check the image. Put things back and check if everything is secured in place.

有些人可能會爭辯說，她可以只拍這張照片並立即開始跑步。但你知道這是極不尋常的。如果這張照片是用我們自己的手機拍的，通常我們脫手套檢查一下照片，把東西放回原處，並檢查是否所有東西都固定到位。

And they need some more time to get back to the shape for moving -- for example, covering their faces with masks and re-orientating the headlamp before holding back the stick. And then we wave goodbye to the one help taking this picture before we start record breaking ascent. Why rush? the clock is not ticking at start point.

他們也還需要一些時間恢復到行進的狀態，例如蓋上保暖面罩、調整頭燈角度，最後才握起登山杖。然後在我們開始破紀錄的上升之前，我們會和拍攝這張照片的人揮手告別。不需要急啊，在起點，時間還沒有開始算。

Some might say this is a fluctuation of GPS positioning, but it is not. According to this GPS track, she moved toward almost the same direction in the following four minutes. This time she climbed up 38 meters and moved 124 meters. This corresponds to moving up 19 meters and 62 meters horizontally in two minutes. There is no obvious fluctuation in this GPS track. The movement is steady and efficient.

有人可能會說這是GPS定位的波動，但事實並非如此。根據這個GPS軌跡，在接下來的四分鐘裡，她幾乎朝著同一個方向移動。這一次她爬升了38米，移動了124米。這對應到兩分鐘內爬升19米，以及水平移動62米。這個GPS軌跡沒有明顯波動。移動非常穩定而有效率。

A much more compelling story is that the GPS track is hacked. The hacker simply followed the instructions he got and create an evenly highspeed ascent. This ascent is record breaking. But he missed what is revealed by this picture. Therefore, we got a paradox. Was she moving fast? Or standing still and taking that picture?

一個更有說服力的說法是，這個GPS軌跡是被駭過的。駭客只是按照他得到的指示，創造了一個勻速的高速上升。這個上升是打破記錄的。但他錯過了這張照片所揭示的內容。因此，我們得到了一個矛盾——她是在快速移動？還是站著不動而拍下了那張照片？

I think this is something general public can understand without getting into all the technics and digits.

我想這是一般人都能理解的事情，不需要去研究所有的技術和數字。

The truth is not in hacked GPS track. It is in your eyes, in your heart.

真相不在被駭過的GPS軌跡中。它就在你的眼睛裡，在你的心裡。