Tapcode

POWswouldusesomethingcalledthetapcode,aformofcommunicationwheretheytappedmessagesonthewalls,inordertotalktoeachotherbetweencells ...,TheTapCode(orKnockCode)isbasedona5×5gridofletters,representingallthelettersoftheLatinalphabetexceptK(Cisusedinstead).,Thetapcode,sometimescalledtheknockcode,isawaytoencodetextmessagesonaletter-by-letterbasisinaverysimpleway.Themessageistransmitted ...,Thetapcodeo...

參考資訊如下
How to use the secret pow tap code

POWs would use something called the tap code, a form of communication where they tapped messages on the walls, in order to talk to each other between cells ...

Tap (Knock) Code

The Tap Code (or Knock Code) is based on a 5×5 grid of letters, representing all the letters of the Latin alphabet except K (C is used instead).

Tap code

The tap code, sometimes called the knock code, is a way to encode text messages on a letter-by-letter basis in a very simple way. The message is transmitted ...

Tap code

The tap code or knock code is a way to encode and transmit messages on a letter-by-letter basis using a series of tap sounds. It has been commonly used by ...

你一定知道摩斯電碼(Morse Code)，可能還熟知如何使用它

... Tap Code嗎？ Tap Code 類似於摩斯電碼，多被囚犯拿來當做在監獄中溝通的方 式。如同它的名字，Tap Code大多用tap，也就是敲擊的聲音來傳輸代碼。被隔 離的囚犯敲擊 ...

敲打密碼

敲打密碼，又或稱為打拍密碼（英語：Tap code、Knock Code，簡稱敲碼或打碼），是一種將文字訊息以一字一字加密的方法。 加密方法十分簡單，如方法名稱所言，加密信息就是以打拍的方式傳達。 打拍密碼常被監獄囚犯用作溝通，方法就是敲打囚倉的鐵圍欄、水管和牆壁。