## When was the Data Encryption Standard made?

Despite the criticisms, DES was approved as a federal standard in November 1976, and published on 15 January 1977 as FIPS PUB 46, authorized for use on all unclassified data.

## What is the history of encryption?

The first use of encryption for military purposes came when the Romans ruled the earth, over two thousand years ago. [8] Caesar needed a way to send communication documents to his troops in the field and thus developed a method called the substitution cipher.

**What is data encryption standard in cryptography?**

Data Encryption Standard (DES) is a block cipher algorithm that takes plain text in blocks of 64 bits and converts them to ciphertext using keys of 48 bits. It is a symmetric key algorithm, which means that the same key is used for encrypting and decrypting data.

### How has cryptography been used in history?

The first known evidence of the use of cryptography (in some form) was found in an inscription carved around 1900 BC, in the main chamber of the tomb of the nobleman Khnumhotep II, in Egypt. The scribe used some unusual hieroglyphic symbols here and there in place of more ordinary ones.

### Where is Data Encryption Standard used?

The Data Encryption Standard (DES) was a standard used by the United States government to encrypt and secure sensitive information. The DES was submitted by IBM to the United States government in the 1970s to secure unclassified, yet sensitive, government information.

**Who is the father of cryptography?**

Claude E. Shannon is considered by many to be the father of mathematical cryptography. Shannon worked for several years at Bell Labs, and during his time there, he produced an article entitled “A mathematical theory of cryptography”.

## What is the oldest form of cryptography?

What is the oldest form of cryptography? Symmetric is the oldest form of cryptography.

## Who introduced cryptography?

**What is Data Encryption Standard DES )? Mcq?**

Answer: a. Explanation: DES is a symmetric key block cipher in which the block size is 64 bits and the key size is 64 bits. It is vulnerable to some attacks and is hence not that popularly used.

### What encryption standard was developed to replace DES and is still in use today?

AES; A symmetric cipher that was approved by the NIST in late 2000 as a replacement for DES. Procedures based on a mathematical formula used to encrypt and decrypt the data.