This page walks you through the basics of performing a simple encryption and corresponding decryption operation. In order to perform encryption/decryption you need to know: Symmetric ciphers use symmetric algorithms to encrypt and decrypt data. In the final article in this series we will look at the use of encryption modes with symmetric block ciphers, including the need for padding and initialization vectors. The most popular Symmetric Algorithms are DES, Triple-DES, AES, Blowfish, RC2, RC4(ARCFOUR), RC5, RC6. Types of encryption: Symmetric Encryption . Symmetric Encryption. First up, we have symmetric cryptography. With this type of key cryptography, the sender and receiver of a message share a single key. These ciphers are used in symmetric key cryptography.A symmetric algorithm uses the same key to encrypt data as it does to decrypt data. Symmetric cryptography is faster to run (in terms of both encryption and decryption) because the keys used are much shorter than they are in asymmetric cryptography. The keys, in practice, represent a shared secret between two or more parties that can be used to maintain a private information link. In symmetric encryption, there is only one key, and all parties involved use the same key to encrypt and decrypt information. The former is symmetric encryption, while the latter is called asymmetric encryption. Use Case of Symmetric Key Cryptography. References and Further Reading. 3DES is Officially Being Retired (2018), by Jasmine Henry; Trends in Cryptography Part 1 – Algorithms and Encryption (2018), by Rob Stubbs Below you can see the code of an application that uses Symmetric-Key Cryptography to encrypt or decrypt a pre-set directory. Just like two Spartan generals sending messages to each other, computers using symmetric-key encryption to send information between each other must have the same key. Both the sender and the receiver need the same key to communicate. Symmetric-key requires that you know which … 1. Here is an example of the AES encryption code (check comments in the code for details): x Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both encryption of plaintext and decryption of ciphertext.The keys may be identical or there may be a simple transformation to go between the two keys. Symmetric encryption (or pre-shared key encryption) uses a single key to both encrypt and decrypt data. The AES encryption is a symmetric cipher that uses the same key for encryption and decryption. Symmetric Encryption. For example, a symmetric algorithm will use key k k k to encrypt some plaintext information like a password into a ciphertext. 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