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Represents the total number of possible values of keys in a cryptographic algorithm or other security measure, such as a password.
Message hidden in unrelated text. Sender and receiver have pre-arranged to use a pattern to remove certain letters from the message which leaves only the true message behind.
If Bob is using asymmetric cryptography and wants to send a message to Alice so that only she can decrypt it, what key should he use to encrypt the message?
3DES can best be classified as which one of the following?
Nicholas is working at a bank in Germany. He is looking at German standards for pseudo random number generators. He wants a good PRNG for generating symmetric keys. The German Federal Office for Information Security (BSI) has established four criteria for quality of random number generators. Which ones can be used for cryptography?
Ahlen is using a set of pre-calculated hashes to attempt to derive the passwords from a Windows SAM file. What is a set of pre-calculated hashes used to derive a hashed password called?
In 2007, this wireless security algorithm was rendered useless by capturing packets and discovering the passkey in a matter of seconds. This security flaw led to a network invasion of TJ Maxx and data theft through a technique known as wardriving. Which Algorithm is this referring to?
Which of the following is the successor of SSL?
You are studying classic ciphers. You have been examining the difference between single substitution and multi-substitution. Which one of the following is an example of a multi-alphabet cipher?
A cryptanalysis success where the attacker discovers additional plain texts (or cipher texts) not previously known.

Question 106 - 212-81 discussion

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The most widely used digital certificate standard. First issued July 3, 1988. It is a digital document that contains a public key signed by the trusted third party, which is known as a Certificate Authority, or C

A.
Relied on by S/MIME. Contains your name, info about you, and a signature of a person who issued the certificate.
Answers
A.
Relied on by S/MIME. Contains your name, info about you, and a signature of a person who issued the certificate.
B.
ElGamal
Answers
B.
ElGamal
C.
RSA
Answers
C.
RSA
D.
PAP
Answers
D.
PAP
E.
X.509
Answers
E.
X.509
Suggested answer: D

Explanation:

X 509 https://en.wikipedia.org/wiki/X.509 In cryptography, X.509 is a standard defining the format of public key certificates. X.509 certificates are used in many Internet protocols, including TLS/SSL, which is the basis for HTTPS, the secure protocol for browsing the web. They are also used in offline applications, like electronic signatures. An X.509 certificate contains a public key and an identity (a hostname, or an organization, or an individual), and is either signed by a certificate authority or self-signed. When a certificate is signed by a trusted certificate authority, or validated by other means, someone holding that certificate can rely on the public key it contains to establish secure communications with another party, or validate documents digitally signed by the corresponding private key. Incorrect answers: RSA - (Rivest--Shamir--Adleman) is a public-key cryptosystem that is widely used for secure data transmission. ElGamal - asymmetric key encryption algorithm for public-key cryptography which is based on the Diffie--Hellman key exchange. It was described by Taher Elgamal in 1985. PAP - used to authenticate users, but is no longer used because the information was sent in cleartext.

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asked 18/09/2024
Rumen Zazyov
33 questions
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