Published on: theplaidhorse.com
Cryptography has been used for thousands of years to protect and hide secret messages. In today’s digital world, where we have plenty of information online, cryptography is an essential part of any individual or enterprise who wishes to keep their data secure. Cryptography is a term derived from the Greek word- kryptos and uses mathematical rules and concepts to secure communication and information. Exactly like the Greek word, which means hidden, the cryptography concept relates to converting unintelligible text into an intelligible one and vice versa.
Cryptography is not something new, as if you would take a look at the past, even the most important battles have been won thanks to some messages that were transmitted secretly. For example the Turing machine is a good example of this innovation, which discovered the cryptic algorithm that the opponents used, which helped Britain at that time. Cryptography has become even more imperative nowadays when data breaches occur daily, and consumer safety can be at risk all the time. The cryptographic algorithm is also the one that has increased the appeal of digital currencies, like Bitcoin and Ethereum, helping them offer a decentralized solution to fiat money. Because of all these features, Ethereum and Bitcoin are the largest cryptocurrencies by market cap. Ethereum for example has leveraged the potential of blockchain, and introduced smart contracts, decentralized applications or NFTs that have positively impacted the ETH coin price.
In this article, we will explore more about cryptography and how it functions.
What is cryptography?
The word cryptography derives from crypt, which means hidden and graphy, meaning writing, and it represents the art of decrypting and encrypting data to secure it and prevent unauthorized access. This is done by using codes that protect the information, and in this way, only the intended individuals can access it.
In cryptography, normal text is transformed into a ciphertext with the help of a combination of numerical computations that are incomprehensible to the majority of people. Cryptography uses unique algorithms and mathematical concepts to make the information difficult to decode. Additionally, these cryptographic algorithms generate cryptographic keys, which are further used for authentication purposes or digital signing.
Discovering the history of cryptography
The history of cryptography can be traced back to almost 4000 years ago in Egypt, where the citizens used hieroglyphics, the oldest type of cryptography, to communicate between them. Then, around the year 500 BC, things changed, and the hieroglyphics were replaced by characters from the alphabet, which were based on secret rules that were known only by a few individuals. These inscriptions from ancient Egypt are the ones that marked the origins of classical cryptography and those that led to the cryptography we know now. The 20th century brought a new era in the crypto world, where electromechanical machines created efficient and sophisticated ways to code or decode.
The major events of the last decades have been the Vigenere cipher and the Enigma, which emphasize the importance of cryptography. Nowadays, cryptography has improved a lot with the help of distributed authentication technology and digital signatures.
Types of cryptography
In the world of cryptography, there are three important types of cryptography, including:
- Secret Key Cryptography. In this type of cryptography, a secret key is used to encrypt and decrypt the data. Communication is improved here as the same key is used both by the recipient and the sender. How does cryptography work in this? Well, the shared key encodes the plaintext into ciphertext, which can only be deciphered by the recipient.
- Public Key Cryptography. In this approach, people have a key that is openly shared and a private one that is kept confidential. The public key encodes or secures the data, while the other one can unlock and decode the information.
- Hash functions. This type of cryptography doesn’t rely on keys but on a unique fixed-length string, commonly known as a hash value. Hash functions are essential in improving data security by verifying data transactions, storing passwords, and enabling signatures.
The main features of cryptography
Encryption
Encryption is one of the most important functions of cryptography. It functions by using complex mathematical algorithms that can scramble normal text into cipher one. The most common algorithms used in cryptography are RSA, AES, and SHA, which can prevent unauthorized access.
Decryption
If encryption turns plain text into indecipherable code, decryption does the opposite. The decryption process uses digital keys that unscramble cipher text. The information can be decrypted just with private keys, so only the holders of those keys will read and access the encrypted data.
Verification of Identities
Numerous features are used for message and identity verification, including certificates, digital signatures and hash functions. With their help, participants are able to validate the identities of the other and ensure that the information comes from a legitimate source. This feature prevents attacks and data interception.
All the features of cryptography, including the ones mentioned above, improve the overall security of data and provide authenticity of identities and data integrity.
Applications in Cryptography
As cryptography offers robust data protection, it has become an essential element in various industries that need to handle sensitive information. For example, cryptography is useful in e-commerce to secure identities, customer payment data and transactions against financial breaches and fraud. Additionally, cryptography is also used in messaging on widely used apps, including WhatsApp, which functions with the help of secret and public key cryptography to ensure authenticity and message privacy and prevent unauthorized access. Blockchain is another domain where cryptography is highly utilized to validate identities, generate transactions pseudonymously, and achieve immutability and consensus without relying on central banks.
Last thoughts
Cryptography is a necessary component in protecting sensitive information, securing digital communication and maintaining online privacy. Additionally, robust encryption fosters trust in this dynamic digital landscape and safeguards businesses and individuals against cyber threats. Cryptography is used in numerous industries for the significant advantages it brings and will continue to have a good implementation in the future as well, where the digital age will develop even more.
