Answer:
The fundamental limitation of symmetric (secret key) encryption is ... how do two parties (we may as well assume they are Alice and Bob) agree on a key? In order for Alice and Bob to communicate securely they need to agree on a secret key. In order to agree on a secret key, they need to be able to communicate securely. In terms of the pillars of IA, To provide CONFIDENTIALITY, a secret key must first be shared. But to initially share the key, you must already have CONFIDENTIALITY. It's a whole chicken-and-egg problem.
This problem is especially common in the digital age. We constantly end up at websites with whom we decide we want to communicate securely (like online stores) but with whom we there is not really an option to communicate "offline" to agree on some kind of secret key. In fact, it's usually all done automatically browser-to-server, and for the browser and server there's not even a concept of "offline" — they only exist online. We need to be able to establish secure communications over an insecure channel. Symmetric (secret key) encryption can't do this for us.
Asymmetric (Public-key) Encryption
Yet one more reason I'm barred from speaking at crypto conferences.
xkcd.com/177/In asymmetric (public key) cryptography, both communicating parties (i.e. both Alice and Bob) have two keys of their own — just to be clear, that's four keys total. Each party has their own public key, which they share with the world, and their own private key which they ... well, which they keep private, of course but, more than that, which they keep as a closely guarded secret. The magic of public key cryptography is that a message encrypted with the public key can only be decrypted with the private key. Alice will encrypt her message with Bob's public key, and even though Eve knows she used Bob's public key, and even though Eve knows Bob's public key herself, she is unable to decrypt the message. Only Bob, using his secret key, can decrypt the message ... assuming he's kept it secret, of course.
Explanation:
Answer:
Explanation:
Exercise A:
1. A table.
2. Categorical.
3. Access.
4.Queries.
5.ACCDB extension.
Exercise B:
1. Insert Tab.
2. DoCmd.Quit method.
3.Navigation Pane.
4. Modify table data.
5.The top pane and the bottom pane.
Hope this helped you!
Answer:
Yes, this statement is completely true
Explanation:
Yes, this statement is completely true. A personal computer is a multimedia machine and can be used to complete an incredibly large number of tasks with ease. Such tasks include all of the ones listed in the question. Aside from that other tasks depend more on the skill level and understanding of the user. For example, an individual who has a vast understanding of technology and programming can create software to perform absolutely any task they may want or need to do.
Answer:
The statement about Multiprocessors that is FALSE is:
a. Asymmetric multiprocessors are a popular form of tightly coupled architecture
Explanation:
Symmetric multiprocessors house two or more identical processors sharing a single main memory. The multiprocessors are tightly coupled, and all of them can access all the connected devices without any preferential treatment of one over the others. This is unlike asymmetric multiprocessors that do not share a single main memory. Instead, they have distributed memories.
Answer:
Answer is (d) value of 10
Explanation:
Usually when we write "int x=10;", a memory space is allocated for an integer variable with name x, and content 10.
