A four-digit PIN code is required for a bank's ATM card. An encrypted code is stored with the bank account instead of storing the card's PIN code. For example, the PIN code 1234 forms the code matrix [32]. The code matrix C is then 4 multiplied by a key matrix K to obtain the encrypted matrix E. In other words, E = C · K. To determine the original PIN code from an encrypted code, the bank uses C = E · K¯¹. Suppose the key matrix is given by [1]. Determine the PIN code (in terms of a matrix) if the encrypted code is 4, 1, 4, 1.
A four-digit PIN code is required for a bank's ATM card. An encrypted code is stored with the bank account instead of storing the card's PIN code. For example, the PIN code 1234 forms the code matrix [32]. The code matrix C is then 4 multiplied by a key matrix K to obtain the encrypted matrix E. In other words, E = C · K. To determine the original PIN code from an encrypted code, the bank uses C = E · K¯¹. Suppose the key matrix is given by [1]. Determine the PIN code (in terms of a matrix) if the encrypted code is 4, 1, 4, 1.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![A four-digit PIN code is required for a bank's ATM card. An
encrypted code is stored with the bank account instead of
storing the card's PIN code. For example, the PIN code 1234
forms the code matrix [32]. The code matrix C is then
4
multiplied by a key matrix K to obtain the encrypted matrix E.
In other words, E = C · K. To determine the original PIN code
from an encrypted code, the bank uses C = E · K¯¹.
Suppose the key matrix is given by [1].
Determine the PIN code (in terms of a matrix) if the
encrypted code is 4, 1, 4, 1.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb6485039-0439-4f9e-b992-c6d1fc46cbba%2F8201b5fe-5b3b-46ff-8ab8-9c89ed82b2ca%2Flln7g_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A four-digit PIN code is required for a bank's ATM card. An
encrypted code is stored with the bank account instead of
storing the card's PIN code. For example, the PIN code 1234
forms the code matrix [32]. The code matrix C is then
4
multiplied by a key matrix K to obtain the encrypted matrix E.
In other words, E = C · K. To determine the original PIN code
from an encrypted code, the bank uses C = E · K¯¹.
Suppose the key matrix is given by [1].
Determine the PIN code (in terms of a matrix) if the
encrypted code is 4, 1, 4, 1.
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