Use the values below to decrypt the numerical ciphertext $$ c=26 $$. Use the following cryptoscheme: Encryption $$ (m+k) \bmod N=c $$ Decryption $$ (c-k) \bmod N=m $$ $$ \begin{array}{l}N=86 \ k=34\end{array} $$ Ex 5

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Lynch Young · Accepted Answer

To decrypt the ciphertext $$ c = 26 $$, subtract the key $$ k = 34 $$ and then take the result modulo $$ N = 86 $$. $$ m = (26 - 34) \bmod 86 = (-8) \bmod 86 = 78 $$ So, the decrypted message is **78**.

Use the values below to decrypt the numerical ciphertext \( c=26 \). Use the following cryptoscheme: Encryption \( (m+k) \bmod N=c \) Decryption \( (c-k) \bmod N=m \) \( \begin{array}{l}N=86 \\ k=34\end{array} \) Ex 5

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Use the values below to decrypt the numerical ciphertext \( c=26 \). Use the following cryptoscheme: Encryption \( (m+k) \bmod N=c \) Decryption \( (c-k) \bmod N=m \) \( \begin{array}{l}N=86 \\ k=34\end{array} \) Ex 5

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