Intro to Cryptography WGU C839

Consists of public and private keys The public key is made public by publishing to a directory or installed on a computer. The private key is kept secret Does not involve exchanging a secret key or key exchange The public key is used to encrypt messages only the recipients private key can decrypt - -Asymmetric Cryptography Slower then Symmetric algorithms provides a secure way to communicate provides a method of validation Non-repudiation - -Disadvantages and Advantages of Asymmetric Cr...

The same key is used to encrypt messages as well as decrypt messages. These algorithms are always faster but have an issue with exchanging keys. - -Symmetric Cryptography Modern cryptography began when Claude Shannon publish "Communication Theory of Secrecy Systems" in 1949. He focused on this concept by quantifying information, leading to a number of methods for encrypting and decrypting information. - -Information Theory Change to one character in plain text affect multiple characters i...

The same key is used to encrypt messages as well as decrypt messages. These algorithms are always faster but have an issue with exchanging keys. - -Symmetric Cryptography Modern cryptography began when Claude Shannon publish "Communication Theory of Secrecy Systems" in 1949. He focused on this concept by quantifying information, leading to a number of methods for encrypting and decrypting information. - -Information Theory Change to one character in plain text affect multiple characters in ...

What produces the same ciphertext from identical plaintext? - -Electronic Codebook (ECB) Vulnerability of DES - -Key length is too short ________ includes a provision for the decryption key in escrow. - -Skipijack __________ combines hashing, data compression, symmetric key, and PKI functions. - -PGP Kerchoffs Principle - -Keys must be absolutely secured. Hashing functions make birthday attacks possible because___________ - -partial-message collision ___________ can be used to efficiently ...

Which encryption standard uses the same key to encrypt and decrypt messages? - -Symmetric Key Encryption Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? - - SKIPJACK What is the most commonly used format for certificates? - -X.509 v3 *Version 3* What is referenced to determine if a certificate has been revoked? - -Certificate Revocation List *(CRL)* What needs to be installed on *end users' computers* to allow them to *trust* applications that have...

1. A business wants to use keys issued by a trusted third party to demonstrate to potential customers that it is a legitimate organization. Which key is used to sign the certificate issued to the business? Private key of the root CA Public key of the root CA Private key of the company Public key of the company - -Private key of the root CA 2. A business wants to use keys issued by a trusted third party to demonstrate it is a legitimate organization to potential customers. Which key shou...

Symmetric - -Which encryption standard uses the same key to encrypt and decrypt messages? Skipjack - -Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? X.509 v3 - -What is the most commonly used format for certificates? Certificate revocation list (CRL) - -What is referenced to determine if a certificate has been revoked? Sender's public key - -What needs to be installed on end users' computers to allow them to trust applications that have been digit...

What type of encryption uses different keys to encrypt and decrypt the message? A Symmetric B Private key C Secure D Asymmetric - -D The most widely used asymmetric encryption algorithm is what? A RSA B Vigenere C DES D Caesar Cipher - -A Original, unencrypted information is referred to as ____. A text B plaintext C cleantext D ciphertext - -B Which of the following is NOT an asymmetric system?A PGP B RSA C SSL D DES - -D In order for User A to send User B an encrypted message...

These are usually the encryption of a message digest with the senders private key. In order to verify them, the recipient uses the senders public key. They are considered good if they provide the following. Authentication Integrity Non-repudiation - -Digital Signature It is a digital document that contains a public key and some information to allow your system to verify where they key came from. This is the most common way to distribute pubic keys in asymmetric cryptography. - -Digital ...