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1. Alice has selected the public key (n = 33; e = 3). Using this key, Bob sends plaintext X to Alice which encrypts as ciphertext 10. What is the plaintext X?
2. In the Diffie-Helman protocol, the common modulus is chosen as n = 19 and the generator g is chosen to be 2. Alice and Bob choose the numbers 6 and 10 privately. What will be the public values they transmit and what would be the final secret computed?"
Using CBC mode of operation what are the consequences of decrypting the cipher text if it has an error in the first bit of the first block C?
Define Physical secuirty and three types of threats related with physical security. Write down the steps in designing and choosing a secure site in detail.
Mitigating DOS Attacks against Broadcast Authentication in Wireless Sensor Networks
The initial state is not output (in contrast to the example). Is this version of two-bit system noninterference-secure with respect to Lucy? Why or why not?
Another variation of Additive cipher uses a keyword instead of a single key. This cipher is called Vigenere cipher. Both variations work exactly the same.
Alice and Bob select the numbers 6 and 10 privately. What will be public values they transmit and what would be final secret computed?
Give the security levels Top SECRET,SECRET,CONFIDENTIAL, and UNCLASSIFIED (order from highest to lowest), and catergories A, B,C, specify what type of access (read,write, both or neither) is allowed in each of the following situations .
You were given the following plaintext and cipertext, and you are needed to find key used by them. plaintext: Using Vigene table, find key used by them to encrypt the message.
Answer the following in relation to a scenario where Bob and Alice use Kerberos for mutual authentication. When Bob receives a ticket from Alice, how does he know it is genuine?
Prescribe a security strategy for a corporate WAN. Be sure to include methods to combat both technical and nontechnical attacks. C
3G Safekeeping model, safekeeping architecture standards ITU-T X.805 and ISO/IEC 18028-2, access points (AP), network admission controller (NAC) and authentication server (AS)
Cross-talk, and other forms of interference are a significant issue in any communications infrastructure. Compare and contrast how this problem would manifest for analog data transmitted
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