Cryptography and Cybersecurity

A symmetric algorithm used to encrypt data and provide confidentiality. It was originally designed as a replacement for DES. It uses multiple keys and multiple passes and is not as efficient as AES, but is still used in some applications, such as when hardware doesn’t support AES.

• 3DES

• SHA256

• MD5

• RC4

A symmetric algorithm used to encrypt data and provide confidentiality. It is quick, highly secure, and used in a wide assortment of cryptography schemes. It includes key sizes of 128 bits, 192 bits, or 256 bits.

• DES

• AES

• RC4

• MD5

Tony and Steve decide to encrypt their communication using an asymmetric encryption algorithm. Which one is the following would be the best to use while meeting their specifications?

• AES with a 256 bit key

• DES

• RSA

• Blowfish

• Twofish

Ann wants to use cryptography to protect passwords for a new web-based tool that is being developed. Shw chooses an algorithm that uses a fixed-length output that is not reversible. Which algorithm might she have chosen?

• SHA-256

• CCMP

• DES

• 3DES

Gene is worried that if an attacker had rainbow tables available that they might be able to crack some of the passwords that have been hashed and stored on a server. Which of the following might render these rainbow table useless?

• Retina scanner

• Salting

• MD5

• Full disk encryption

Bruce is setting up an 802.11ac network and wants to ensure the highest level of security. Which of theses options would be the best to meet his specifications?

• WPA2 with TKIP

• WPA2 with AES

• WPA2 with SSL

• WPS2 with MD5

In which type of encryption is the same key used to encrypt and decrypt data?

• private
• public
• symmetric
• asymmetric

What type of cryptographic algorithm is considered to be a one-way algorithm, in that its contents can't be used to reveal the original set of data?

• hash
• key
• digest
• block

After the DES cipher was broken and no longer considered secure, what encryption algorithm was made as its successor?

• AES
• Twofish
• 3DES
• RSA

What type of cryptography uses two keys instead of just one, generating both a private and a public key?

• Symmetric
• Asymmetric
• Shared
• Open