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:
The question above has multiple choices as follows;
a. API
b. docstring
c. help
d. man
Well, I am stuck between B and C. I’ll however settle for (B) docstring.
Python docstrings provide an easier way to associate
documentation with python classes, modules and functions. The interactive help function
on the other is built in and is intended for interactive use. This function
exists to view help interactively. With the help feature, you can quickly learn
classes, modules, functions and many more.
My recommendation as an immediate response to prevent further spoofing of the host is to Revoke the host's certificate.
<h3>What does revoke certificate mean?</h3>
Certificate revocation is the process by which one can invalidate a TLS/SSL and this is one that is often done before its scheduled expiration date.
Note that A certificate need to be revoked immediately and as such, based on the case above, My recommendation as an immediate response to prevent further spoofing of the host is to Revoke the host's certificate.
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