Cryptography: Securing Digital Communication's Future

From your Instagram DMs to your online banking app, a secret code is working behind the scenes to keep your digital information secure. Cryptography, the ancient art of secret writing, continues to evolve into one of the most vital tools for modern cybersecurity. However, bad actors continue to find opportunities to exploit cyber threats and data breaches to target unsuspecting victims and take advantage of their vulnerabilities. Layers of cryptography work to thwart the plans of cybercriminals and ensure your personal information stays out of the wrong hands. Understanding how cryptography works to secure the future of digital communication and why it’s vital to your cybersecurity can help to protect your online life. Cryptography is a method to secure information and keep it away from unauthorized, prying eyes. It uses a mixture of computer science, math, and a dab of spycraft to transform information into code so that only authorized parties can understand it. Once data is encrypted through cryptography , only an authorized key can decrypt it and make it readable. Whether you log into email, shop online, or start a private chat on social media, cryptographic algorithms are encrypting (scrambling) your data so that cybercriminals and hackers won’t be able to read it. Derived from the Greek words kryptos (hidden) and graphein (to write), cryptography has been around for thousands of years. In 58 B.C. Julius Caesar invented the eponymous Caesar Cipher to send secret military messages. The 16th-century French diplomat, Blaise de Vigenère invented his eponymous Vigenère Cipher that was used by the Confederate Army in the American Civil War. The Enigma Cipher, invented by German engineer Arthur Scherbius, was heavily used by German forces in World War II. Today, cryptography is the foundation of secure online communication. If you ever had a secret decoder ring as a kid, you understand the basic foundation of how cryptography works. You’d receive a scrambled message from a friend, based on a special code that only your decoder ring code could unscramble. The message wouldn’t change, but the school bully who tried to intercept your communication wouldn’t be able to make sense of it.  Cryptography is based on identical principles. Basic cryptography takes plaintext and scrambles it into ciphertext, which can only be deciphered by someone with the right encryption key. Here’s a simplified breakdown: Encryption bolsters cybersecurity and makes cryptographic algorithms virtually impossible to decipher by an unauthorized party. Although cryptography is used for a multitude of applications, there are only two basic types of cryptography: 1. Symmetric Encryption Symmetric encryption enables both the sender and receiver of a message to use the same key — kind of like using a shared password. Symmetric encryption is used to secure large amounts of data (for example, if you’re sending a document file). A popular symmetric algorithm is AES (Advanced Encryption Standard), which even the U.S. government uses to protect classified information. 2. Asymmetric Encryption Asymmetric encryption, also referred to as public key cryptography, uses two keys — a public key for encryption and a private key for decryption. This type of cryptography is used to secure websites with SSL/TLS protocols. The asymmetric encryption algorithms, RSA and Elliptic Curve Cryptography (ECC) are also widely used to secure online communication, protect digital signatures, and are utilized in cryptocurrency transactions. Even though you may not realize it, you interact with cryptography multiple times a day. Real-life applications of cryptography include: Cryptography is like a virtual Maurauder’s Map, à la Harry Potter , that guards your personal data. Cryptography has had major security implications long before the advent of the Internet. For example, the award-winning film, The Imitation Game, told the story of Alan Turing (Benedict Cumberbatch) and his ability to crack the German’s Enigma Code, a cipher device used to encode messages in World War II. Turing’s story and his team’s tireless work are riveting onscreen, and the cryptography messages he deciphered proved crucial to the Allies’ eventual victory in the war. This real-life example of cryptanalysis (code-breaking) showcases the profound impact cryptography has had—and continues to have—on global events and personal freedoms. Today, the stakes may be different, but the battle for secure digital communication is just as fierce. In the age of AI and constant connectivity, digital privacy is vital. The cost of cybercrime is expected to reach a staggering $15.63 trillion by 2029, making cryptography and other cybersecurity protections even more imperative. Strong encryption can mean the difference between a thwarted attack and a catastrophic leak. Cryptography plays a critical role in defending against: Although cryptography is a powerful tool in securing digital communication, it isn’t foolproof. Some of the risks associated with encryption include: Using cryptographic encryption can help protect your digital life, and here are some of the ways it’s used for your protection: In the future, cryptography will continue to work behind-the-scenes to keep your digital communication safe and secure. To learn more about cryptography and cybersecurity, visit What Is My IP Address to  check out our Easy Prey podcast and our blog . Explore our cybersecurity tips to help you protect your digital life.