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Why Cryptography is the Key to Digital Security

According to kaspersky.com, cryptography is the study of secure communications techniques that allow only the sender and intended recipient of a message to view its contents. Cryptography is closely associated with encryption, which is the act of scrambling ordinary text into what’s known as ciphertext and then back again upon arrival.

In addition, it also covers the obfuscation of information in images using techniques such as microdots or merging. When transmitting electronic data, the most common use of cryptography is to encrypt and decrypt email and other plain-text messages. The simplest method uses the symmetric or “secret key” system.

Cryptography is the Key to Digital Security

Hence, your data will be encrypted using a secret key, and then both the encoded message and secret key are sent to the recipient for decryption. The problem? If the message is intercepted, a third party has everything they need to decrypt and read the message.

What is Cryptography in Security

To address the issues of security breaches, cryptologists devised the asymmetric or “public key” system. In this case, every user has two keys: one public and one private. Senders will request the public key of their intended recipient, encrypt the message and send it along.

When the message arrives, only the recipient’s private key will decode it, meaning theft is of no use without the corresponding private key. This is why users need to always encrypt the messages they send, ideally using a form of public-key encryption.

Cryptography and Network Security

Cryptography as an automated mathematical tool plays a vital role in network security. It assures the confidentiality and integrity of data as well as provides authentication and non-repudiation to users

The cryptography technique consists of encryption and decryption algorithms. The encryption algorithms perform scrambling of ordinary text and generate an unreadable format for the third party known as ciphertext. The original data is restructured by the intended receiver using decryption algorithms.

The techniques have broadly been classified into 3 categories

  • Symmetric-key Cryptography
  • Asymmetric-key Cryptography
  • Authentication Cryptography
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The algorithms are widely accepted and were outlined with their relative advantages and disadvantages. Moreover, recent proficient cryptographic algorithms specific to cloud computing, wireless sensor networks and on-chip-networks are thoroughly discussed that provide a clear view of acquiring secure communication in the network using cryptography.

Why is Cryptography The Key to Digital Security

Despite its reputation as a language only of spies and hackers, cryptography plays a critical role in our everyday lives. Though often invisible, it underpins the security of our mobile phone calls, credit card payments, web searches, internet messaging, and cryptocurrencies – in short, everything we do online.

Increasingly, it also runs in the background of our smart refrigerators, thermostats, electronic car keys, and even the cars themselves. As our daily devices get smarter, cyberspace – home to all the networks that connect them – grows.

Cryptography has been broadly defined as a set of tools for establishing security in this expanding cyberspace, cryptography enables us to protect and share our information. Understanding the basics of cryptography is the key to recognizing the significance of the security technologies we encounter every day, which will then help us respond to them.

  • What are the implications of connecting to an unprotected Wi-Fi network?
  • Is it so important to have different passwords for different accounts?
  • Is it safe to submit sensitive personal information to a given app or to convert money to Bitcoin?

Download the book that talks about the answers to the questions above. In clear, concise writing, information security expert Keith Martin answers all these questions and more, revealing the many crucial ways we all depend on cryptographic technology.

Cryptography Courses for Beginners

The courses on Coursera.org will aid you to learn the job-relevant skill that you can use through an interactive experience guided by a subject matter expert. Access everything you need right in your browser and complete your project confidently with step-by-step instructions.

You can take the courses from the world’s best instructors and universities. Courses include

  • Recorded auto-graded and peer-reviewed assignments
  • Video lectures
  • Community discussion forums
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When you complete a course, you’ll be eligible to receive a shareable electronic Course Certificate for a small fee. Whether you’re looking to start a new career or change your current one, Professional Certificates will help you become job-ready.

Learn at your own pace from top companies and universities, apply your new skills to hands-on projects that showcase your expertise to potential employers, and earn a career credential to kickstart your new career.

Why you need the Cryptography Certificate

With so much communication taking place digitally these days, deepening your understanding of cryptography is an effective way to understand communication as a whole more comprehensively. It’s also an essential concept to dig more deeply into if you’re curious about internet security or are thinking about pursuing a career in that field.

Even the simplest tasks on your digital to-do list, like checking your email inbox or bank balance, involve cryptography — it’s a process that’s hard at work behind the scenes in your daily life. Gaining more insight into what it is and how it works equips you with a better understanding of the technological processes that keep you safe online — an essential in this day and age.

Cryptography Certification Eligibility

You’ll find a variety of career opportunities at your fingertips when you study cryptography, including becoming a cryptographer. In this role, you’ll design algorithms and codes that help encrypt data on websites to keep this information (and the users it comes from) safe.

You might also opt to become a cryptanalyst, using your skills to crack the Ciphers that secure data to pinpoint weaknesses in encryption systems. It’s like working as a codebreaker for the digital age, with fresh opportunities to solve problems and the satisfaction of overcoming security challenges around every corner.

Cryptography becomes much less of a cryptic concept when you enrol in online courses that make it easy to discover this exciting area of study.

From learning the basics of how cryptographic systems operate to using number theory and encryption to solve real-world problems via skill-building projects, taking classes online brings this world of internet security to life — and provides you with a thorough understanding of it — right in your own home (or anywhere you access your coursework).

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You can earn credits from online cryptography courses to put towards a degree in computer science, advance in your career as a cybersecurity analyst and do so much more with new skills and discoveries gained through the freedom of taking classes when it’s most convenient for you.‎

Cryptography tutorial

The tutorial explains how programmers and network professionals can use cryptography to maintain the privacy of computer data. Starting with the origins of cryptography, it moves on to explain

  • Cryptosystems
  • Various traditional and modern Ciphers
  • Public key encryption
  • Data integration
  • Message authentication, and
  • Digital signatures

This Cryptography tutorial is meant for students of computer science who aspire to learn the basics of cryptography. It will be useful for networking professionals as well who would like to incorporate various cryptographic algorithms to ensure secure data communication over their networks.

The tutorial has been prepared with the view to make it useful for almost anyone curious about cryptography. Basic knowledge of computer science and a secondary level of mathematics knowledge is sufficient to make the most of this tutorial.

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