Divide plaintext into blocks and apply multiple rounds of substitutions and permutations to create ciphertext.A symmetric key algorithm that uses a block cipher to encrypt data.One such technique is the Data Encryption Standard (DES), which was first introduced by IBM in 1975.ĭES became a widely used standard for secure communications because it effectively protects sensitive information from unauthorized access. What is the Data Encryption Standard (DES)?įrom the early days of cryptography, encryption techniques have evolved and become more complex over time. Today, cryptographic techniques have become more advanced with the advent of modern computing technologies such as public key cryptography and quantum cryptography. In 1977, IBM introduced the Data Encryption Standard (DES), which became one of the most widely used encryption algorithms during its time. The invention of the telegraph in the mid-19th century led to an increase in the use of cryptography for secure communication over long distances.ĭuring World War II, both sides developed sophisticated cryptographic systems that played a crucial role in shaping the outcome of the war. The history of encryption techniques dates back to ancient times when people used various methods, such as substitution ciphers and transposition techniques, to keep their messages secret. What is the Data Encryption Standard (DES)?.
A Brief History of Encryption Techniques.
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