Question

A=0,B=1, C=2, ..., Z=25 Pecahkan kode ciphertext "UXNS QT" dengan fungsi dekripsi p = f(c) = (-5 (c - 1)) mod 26?

Answer 1

Answer:

p = f(c)

= -5(2-1)

= -5(1)

= -5.....

hope it helps ✔✔

Answer 2

Aɴꜱᴡᴇʀ

F(c)=-5

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Gɪᴠᴇɴ

A=0 ,B=1, C=2.........Z=25

F(c)=(-5(c-1))

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Tᴏ ꜰɪɴᴅ

F(c) =??????

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Fᴏʀᴍᴜʟᴀ Uꜱᴇᴅ

substitution

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Sᴛᴇᴘꜱ

$\sf{given \: that \: c = 2 \: } \\ \sf{and \: f(c) = ( - 5(c - 1))--------1 }\\ \sf{so \: sub \: in \: 1 \: we \: get \: f(c) = ( - 5(2- 1)} \\ \sf{thus \: f(c) = ( - 5(1))} \\ \sf{f(c) = - 5}$

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$\huge{\mathfrak{\purple{Hope\:it\:helps}}}$