Comp Sci Is the key of this encryption (transposition cipher) correct?

[shivajikobardan]

Homework Statement

Transposition Cipher

Relevant Equations

no conversion of Plain Text to cipher, just change the position of plaintext.

I don't have much to add in this post as it's apparent from the figure itself.
DAEX
UVFU
RSES is column number 3 not 6. So, I think that's a mistake.

I'm following this book for this sub topic only.

CRYPTOGRAPHY AND NETWORK SECURITY By PRAKASH C. GUPTA

 

[Filip Larsen]

Homework Statement:: Transposition Cipher
Relevant Equations:: no conversion of Plain Text to cipher, just change the position of plaintext.

RSES is column number 3 not 6. So, I think that's a mistake.

If the ciphertext is the columns written out in increasing key-digit order then it appears correct to me. Not sure what you mean the mistake should be.

 

[shivajikobardan]

If the ciphertext is the columns written out in increasing key-digit order then it appears correct to me. Not sure what you mean the mistake should be.

uuh it's confusing as there're multiple perspectives.

I first gave columns numbering as it should be, so according to my numbering:
1-GAIO
2-UVFU
3-AETR
4-RSES
5-DAEX
6-LTNX
7-EFHX

And the key here's 5263174
so this'd be the order:
DAEX,UVFU,LTNX,AETR,GAIO,EFHX,RSES

 

[Filip Larsen]

Based on the picture from your textbook alone it seems you are doing it wrong. I understand the encoding procedure to be

1. Write out the clear text one row at a time over 7 columns, padding with X (which seems like a bad idea, but never mind that now).
2. Write the key so one digit is above each column.
3. Write out the ciphertext as the full column marked 1, then 2, and so on up to 7.