15.1 - Cryptography

 15.1 - Cryptography 

 

Key Terms: 

  • Cryptography – The science and study of concealing information that is used in electronic communication. 

  • Cipher/Algorithm - A process or formula used to convert or hide the meaning of a message. 

  • Key – A variable in a cipher that is used to encrypt or decrypt a message. 

  • Plain text – The readable form of communication that is visible to everyone. 

  • Ciphertext – An encrypted form of communications that makes the communication unreadable. 

  • Encryption – The process of using an algorithm or cipher to transform data from clear text to ciphertext. 

  • Decryption – The process of converting data from ciphertext to plain text. 

  • Steganography – The process of hiding data or a message so that only the sender and receiver suspects that hidden data exists. 

  • Cryptanalysis – The method that is used to recover data that has been encrypted without having access to the key used in the encryption process. 

  • Symmetric Encryption – A form of encryption that provides confidentiality with a weak form of authentication of integrity. 

  • Block cipher – Symmetric encryption that transposes plain text to ciphertext in blocks. 

  • Stream cipher – Symmetric encryption that is performed on each bit within a stream of data in real time. 

  • Ron’s Cipher V5 or Ron’s Code v5 (RC5) - A symmetric cryptography method that implements a symmetric-key block cipher cryptographic algorithm produced by RSA Security Inc. 

  • Ron’s Cipher v6 or Ron’s Code v6 (RC6) - A symmetric block cipher cryptographic algorithm. 

  • International Data Encryption Algorithm (IDEA) - A symmetric encryption method that is a minor revision of PES. It uses 64-bit blocks with 128-bit keys. 

  • Data Encryption Standard (DES) - A very popular symmetric cryptography method created by the NSA. 

  • Triple DES (3DES) - An enhanced version of DES that corrects DES’s known weaknesses. 

  • Advanced Encryption Standard (AES) - An iterative symmetric block cipher that was developed as a replacement for DES in 2001. 

  • Blowfish – A keyed symmetric block cipher that was intended to be free of the problems associated with other algorithms and replace DES. 

  • Twofish – A symmetric block cipher that permits a wide variety of tradeoffs between speed, size, key setup time and memory. 

  • Asymmetric encryption – An encryption method that uses two mathematically related keys called a key pair. 

  • Challenge-Handshake Authentication Protocol (CHAP) - A procedure that uses a three-way handshake mechanism to protect passwords. 

  • Diffie-Hellman Key Exchange – An asymmetric algorithm that generates symmetric keys simultaneously. 

  • Digital Signature Algorithm (DSA) - A federal standard for digital signatures that uses modular exponentiation and the discrete logarithm problem. 

  • Elliptic Curve Cryptography (ECC) - A public-key cryptography method that is based on groups of numbers in an elliptical curve. 

  • Extensive Authentication Protocol (EAP) - A framework that provides a standardised method to negotiate wireless authentication between wireless devices. 

Comments

Post a Comment

Popular posts from this blog

OSA Summer 2023 Mock - Task 1, Assignment 1

Image
  OSA Summer 2023 Mock – Task 1           Legal requirements   The company must ensure they are compliant with the correct legislation whilst the project is undertaken.   If any person is working at height, the correct safety measures to prevent injury or death must be imposed under The Work at Height Regulations 2005. They must have an appropriate safety harness on and hazardous areas at height should be i dentified in the risk assessment.   By storing data internally on a local file server, the business is responsible for maintaining the confidentiality, availability and integrity of that data. They must comply with The Data Protection Act 2018 and General Data Protection Regulations.   Display screen equipment regulations (DSE) should be considered when installing workstations. Ergonomic and posture-friendly chairs should be installed and employees given appropriate breaks from working around screens.     Data p...
Read more

OSA Assignment 1 - Task 1 GUIDE

  OSA Assignment 1 – Task 1 Guide     Exam parameters   Time length – 3 hours   Marks available – 20     Task 1: Planning   In this task you are required to submit :   A project plan   Gantt chart showing th e critical path   Explanation of legal requirements   Physical and digital threat countermeasures   Annotated floor plan     Gantt Chart   The Gantt Chart is the first document you should create. This details each phase of the project alongside the timescale to complete it.   Ensure you make a note of the deadline for the project along with any pre-requisites such as cabling. This should all be implemented into your Gantt Chart.   You can follow a layout like this:   Project:   Pre considerations (Gathering project timescale, risk assessments, ...)   Planning (Devising project plan, identifying budget, ...)   Design (Research hardware, identify topology, ...)   Pre ...
Read more

Useful Core A Acronyms

  Useful core A acronyms     NGO – Non governmental organisation   KPI – Key performance indicator   USP – Unique selling point   CRM – Customer relationship management   Saas – Software as a service   CAB – Change advisory board   SMARTER – Specific, measurable, accurate , realistic, time-bound, evaluate, re-evaluate   IPO – Intellectual property office   RCD – Registered community designs   UCD – Unregistered community designs   TNA – Training needs analysis   PRR – Post project reviews   COBC – Code of business conduct   BCS – British computing society   ML – Machine learning   CVS – Computer vision syndrome   RSI – Repetitive strain injury   DSE – Display screen equipment   HSE – Health and safety executive   ODD – Optical disk drive   RPM – Revolutions per minute   CPU – Central processing unit   RAM – Random access memory   EMI – Electromagnetic inter...
Read more