CompTIA Security+ Cryptography Quiz!

When a particular message has been encrypted using random combinations, a person who is capturing this message will have to try all combinations of deciphering possible to expose the original message. This is known as brute force attack.

According to Caesars Cipher key value of 3, you would be sliding up the alphabetical value by 3. Hence H would be represented as J, E as G, L as O and O as Q.

Cryptography without keys is not at all secure as the deciphering program will reside on the same media where the data or message is being received. In case of thest, the data can be stolen along with the deciphering program.

RC5 and Blowfish are encryption systems. MAC is a type of hardware address. ARP is a protocol that resolves MAC address to IP address.

When cryptography uses hash function on a plain text, a fixed length of data called the message digest is generated. This message digest helps to preserve the data integrity by generating a a digest value when the data was originally transmitted. If during transmission the data gests modified, the message digest value that will be resulting will be a totally different value from the original one. This is usually verified at the receiving end before accepting and confirming the receipt of data.

They forma an essential part of Web site security system, as it is the most convenient security system for Web sites considering that clients would be accessing the Web site over the public network. The Certificate security system uses the basic logic of Public/Private key pairs.

ECC is the encryption system used in cellular devices.

The issues with key distribution faced by conventional encryption was overcome by the Public-key cryptography concepts introduced by Diffie-Hellman.

A digital signature is synonymous with the handwritten signature. A signature though unique to that person varies with the person's age. Similarly, although a digital signature is unique and is used to establish the origin of that signature, it can vary from situation to situation.

Differential Cryptanalysis is nothing but pattern studying. It chooses a pair of plain text with specific differences.

Network resource access will have to be controlled through access permissions. Server access will have to be controlled through physical security to the server. Unauthorized access prevention of stored information or information being transmitted is the role of cryptography.

Brute force attack is the most common attack faced by the DES algorithm

Keys are measured by bits.

When conventional encryption is used for stored data rather than the data being transmitted, encryption and decryption process can be very fast.

There are two types of key-based algorithms. Depending on the key pair types they use, they can be categorized as symmetric or asymmetric algorithms.

Cryptography without encryption and before encryption is not cryptography at all. Cryptography is possible with keys and without keys. When used without keys, it will be using simple or complex substitution.

The block size in RC5 can be 32-bit, 64-bit or 128-bit.

SHA is a security hash algorithm that is used with encryption protocols. Its latest version is SHA-1.

IDEA provides high level of security along with ease of implementation.

ABA concerns itself with key issues in providing security to financial transaction/communication between banks.

To keep a message a secret it is required that the cipher must be able to generate several cipher text.

RC2 or Rons code 2 is a 64-bit block cipher. It was devised by Ron Rivest.

Cryptanalysis is a process of studying the pattern of secure communication and breaking it. It involves complex combinations such as patience and determination combined with skills of pattern finding, mathematical tools and analytical reasoning.

The implementation of Public-key cryptography does not need any existing security measures to be implemented. The public key can only encrypt and the Private key can only decrypt.