20 Questions
Which type of cipher encrypts each bit in the plaintext message one bit at a time?
Stream cipher
Which type of cipher takes a predetermined number of bits, known as a block, and encrypts that block?
Block cipher
By setting the block size to one bit, a block cipher can act as which type of cipher?
Stream cipher
Which type of cipher is often slower but more versatile compared to stream ciphers?
Block cipher
The RSA algorithm is an example of which type of cryptography?
Asymmetric-key algorithm
What does SSL stand for?
Secure Sockets Layer
What is the purpose of a digital signature?
To detect changes to a message
What is a certificate authority responsible for?
Signing certificates
What does a certificate allow you to verify?
The association of a public key with an individual
What is the RSA algorithm named after?
Its creators
Which component is NOT part of a PKI infrastructure?
Encryption algorithms
Which of the following is NOT a reason for revoking a certificate in PKI?
Change in certificate owner's name
Which type of data is considered 'data at rest'?
Backup tapes
Which two protocols are commonly used to secure VPN connections?
IPsec and SSL
Which type of VPN connection requires a more complex hardware configuration?
IPsec VPN
What is the weakness of SSL VPN?
Can be downloaded to public computers
What does a digital signature ensure in addition to message integrity?
Message authenticity
What is the purpose of a registration authority in PKI?
To issue and verify certificates
What is the difference between data at rest and data in motion?
Data at rest is stored on backup tapes, while data in motion is sent over the internet
What is the relationship between SSL and TLS?
TLS is the evolution of SSL
Test your knowledge of symmetric key cryptography with this quiz! Learn about the differences between block and stream ciphers, and discover how a block cipher can act as a stream cipher. Challenge yourself and become an expert in digital encryption techniques.
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