Is there a 112-bits Triple DES example implementation in Python?

StackOverflow https://stackoverflow.com/questions/11070485

  •  15-06-2021
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Question

Is there a 112-bits Triple DES example implementation in Python?

I've found pydes, but it works only with 16 or 24 bytes for Triple DES.

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Solution

In DES keys, the least significant bit of each byte is used for a parity check. So, in 16 bytes there are only 16 * 7 = 112 independent bits. 112 bits is commonly known as the effective key size/length for TDEA (the official NIST name of triple DES) keying option #2. 112 bit keys for TDEA are also known as DES ABA keys as the 1st and 3rd keys are identical within the scheme.

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