Triple DES with 2 Keys and 3 Keys | IS - 3.2

Triple DES performs the same operation as double DES. Triple DES using two keys K1 & K2 while encrypting plain text. First it performs encryption on plaintext P, which is encrypted using K1 obtains first cipher text C1. Again, this cipher text is encr

Both of these versions were commonly used for many years to provide more security than DES and technically are still secure, since computers can't yet quickly try 2112 or 2168 possible key combinations.

To prevent this from happening double DES and triple DES were introduced which are much more secured than the original DES because it uses 112 and 168 bit keys respectively.

A Triple DES two-key version exists, where the same algorithm runs three times but K1 is used for the first and last steps. This two-key variant was retired in 2015.

簡單的說，Triple DES 系統是連續使用 DES 編碼器三次，如只用到兩把 56 個位元的鑰匙（112 bits），則稱為 Two-keys 3DES（如圖 3-2 所示）。

In this video, we explore Triple DES (3DES), the standard that replaced DES to defend against brute-force attacks. We explain the complete working mechanism, specifically the...

密碼學 中， 三重資料加密演算法 （英語： Triple Data Encryption Algorithm，縮寫為TDEA，Triple DEA），或稱 3DES （Triple DES），是一種 對稱金鑰加密 塊密碼，相當於是對每個資料塊應用三次 資料加密標準 （DES）演算法。