Kerckhoffs principle - Study guides, Class notes & Summaries

CRY 303c Final Exam | Questions with complete solutions Which of the following violate Kerckhoff's principle? Select all that are applicable. A. A company states that its system is "secure" because it uses confidential and proprietary protocols. B. The company password is written using an invisible ink, and only the people within the company know the fact that invisible ink is used. C. The algorithms for popular symmetric ciphers such as DES and AES are publicly known. D. The attacker has t...

Certified Encryption Specialist Questions and Answers 100% Pass Cryptography The science of altering communication so that it cannot be understood without having a key. Caesar Cipher Simple cipher that uses shifting letters. Atbash Used by Hebrews, cipher that reverses the alphabet. ROT13 Cipher that rotate or shifts by 13 letters. Scytale Cylinder tool used to encrypt and decrypt plaintext using a cloth or piece of leather wrapped around a rod. Vigenere Cipher Most common multi-alphabetic ...

Certified Encryption Specialist Latest Update October 2024 Cryptography - Answer--The science of altering communication so that it cannot be understood without having a key. Caesar Cipher - Answer--Simple cipher that uses shifting letters. Atbash - Answer--Used by Hebrews, cipher that reverses the alphabet. ROT13 - Answer--Cipher that rotate or shifts by 13 letters. Scytale - Answer--Cylinder tool used to encrypt and decrypt plaintext using a cloth or piece of leather wrapped around a rod. ...

The __________ cipher is a method of encrypting alphabetic text by using a series of different monoalphabetic ciphers selected based on the letters of a keyword. Vigenère ROT13 Atbash Scytale Answer Vigenère A cybercriminal wants to deliver steganized files to covert customers on a third-party cache. What method must be used so that the third party is unaware of these transactions and the customer can access the files? Delivery zone FTK server Dead drops Echo method Answer Dead ...

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 -Correct Answer X.509 v3 What is referenced to determine if a certificate has been revoked?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

Certified Encryption Specialist Questions and Answers 100% Pass Cryptography The science of altering communication so that it cannot be understood without having a key. Caesar Cipher Simple cipher that uses shifting letters. Atbash Used by Hebrews, cipher that reverses the alphabet. ROT13 Cipher that rotate or shifts by 13 letters. Scytale Cylinder tool used to encrypt and decrypt plaintext using a cloth or piece of leather wrapped around a rod. Vigenere Cipher Most common multi-alphabe...

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. - ANSWER 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. - ANSWER Information Theory Change to one character in plain text affect mult...

Certified Encryption Specialist Questions and Answers 100% Pass Cryptography The science of altering communication so that it cannot be understood without having a key. Caesar Cipher Simple cipher that uses shifting letters. Atbash Used by Hebrews, cipher that reverses the alphabet. ROT13 Cipher that rotate or shifts by 13 letters. Scytale Cylinder tool used to encrypt and decrypt plaintext using a cloth or piece of leather wrapped around a rod. Vigenere Cipher Most common multi-alphabetic ...

What security services does cryptography provide? What security services does cryptography not provide? - ANSWER - Provides: Confidentiality Integrity Authentication Non Repudiation Does Not Provide: 1. Access Control Data confidentiality: How to achieve data confidentiality? How to protect the confidentiality of bulk data (say 1 Giga bytes)? - ANSWER - Encryption What does Kerckhoffs' assumption/principle tell us? Why is it important? - ANSWER - "a cryptosystem should be s...

Confidentiality - Only authorised people can read a message. A key is needed in order to read the message. Authentication - Only authorised people can write a message. A key is needed in order to write the message. Symmetric key cipher - KE = KD (or can easily be deduced from one another). Symmetric key cipher - Encryption and decryption keys known only to the sender and receiver. Symmetric key cipher - Requires a secure channel for transmission of the cryptographic key. Asymmetric key...