Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both encryption of plaintext and decryption of ciphertext.The keys may be identical or there may be a simple transformation to go between the two keys. _____ is an open encryption and security specification designed to protect credit card transactions on the Internet. Ans: False, 42. Substitution is an ______ way of encryption. B. Encryption, Corruption A. C. Ciphering, Corruption 19. Memory protection is usually performed by hardware mechanisms, such as ______ or _____. Ans: False, 74. C. 56 bit, DES Double DES B. Cracker or career attacker The combination of key exchange, hash, and encryption algorithm for each SSL session is defined as______. B. Intruders B. Byte Substitution B. Alpha C. WANs C. NSH Low diffusion, Low error dissemination. B. Ans: Pair of keys (two keys). B. Asymmetric cryptography is one of these methods and is a more advanced version of symmetric cryptography, which we will explain first. IKE is considered a hybrid protocol because it combines (and supplements) the functions of three other protocols _______ and ________. True / False Ans: Features, assurance, 49. C. Exponential cypher, Users A. Encrypted e-mail dilemma Ans: Session. D. Changing, Trust, 65. Separation in an operating system cannot occur in several ways. The ___________protocol is responsible for sending change Cipher Spec messages. Ans: ISAKMP, 65. A. Hash B. NULL Required fields are marked *. One key either Private key (Secret key) or Public Key (known to everyone) is used for encryption and other is used for decryption; Weakness of the Public Key Encryption: Public key Encryption is vulnerable to Brute-force attack. D. Decryption, 50. A. B. WWW Advantages and Disadvantages of symmetric key cryptography Impersonation is a more significant threat in a wide area network than in a local one. If you are looking for a reviewer in datacom, topic in Electronics Systems and Technologies (Communications Engineering) this will definitely help you before taking the Board Exam. C. Key exchange and Authentication How many users can use a secret key? _______ and _______ address external security threats. A. Redundancy C. Two Ans: Symmetric encryption, 77. C. Security Parameter Index(SPI) _________ refers to the weakness in the security system. Temporary acquired permission, Memory B. Encipherment Complexity Which of the following allows a function to be performed on more than one node? One key is used to encrypt data, while another is used to decrypt data. A. Modularity A. C. Passive and Active wiretapping The keys are simply large numbers that have been paired together but are not identical (asymmetric). Temporary acquired permission, Files On the other hand Public Key cryptography is basically an asymmetric approach. Ans: True, 44. Ans: Encryption, 6. D. Password, Memory, 43. B. C. community standards, expectations There are two keys in this approach and one is basically the public key and any user can access the information. B. A. ESP seeks to provide ______ and _______by encrypting data to be protected and placing the encrypted data in the data portion of the IP ESP. B. ________ identifies and organizes the security activities for a computing system. Constant, Modify The security association that applies to a given IPSec header is determined by the packets ______ and the _______ in the packet header. C. Symmetric algorithm, Asymmetric algorithm Ans: Firewall, 81. C. Modification, Production You can protect the IP datagrams by using one of the IPSec protocol elements, the ___ or the___. B. Logarithmic cypher, Senders A key advantage of the group protection approach is its ____________. D. Accounting and Personal activities, 12. D. Security Associations(SA), 68. The size of the enciphered text should be no larger than the text of the original message. Also known as conventional cryptography, symmetric cryptography requires the sender and the receiver of confidential information to share a key. C. Session and Connection B. C. Users, Trapdoors D. No keys, 48. ________ is another way to segment the network. A. LANs Ans: Security plan, 86. This site uses Akismet to reduce spam. Each cycle of AES algorithm consists of _____ steps. Encryption Algorithm.It is a mathematical process that produces a ciphertext for any given plaintext and encryption key. Ans: 56, 22. Stream encryption C. Diffie-Hellman Scheme C. AES, Implementation SSL utilizes ___________Algorithm in order to provide a message integrity. D. Limited use of an object, 30. Ans: Discrete logarithm problem, 28. C. 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