Symmetric Algorithms

Begin Learning Cyber Security for FREE Now!

FREE REGISTRATION
Already a Member Login Here

Symmetric Algorithms:


A symmetric algorithm uses the same key for encrypting and decrypting data. Symmetric algorithms supply confidentiality by encrypting data or messages. Some previous and current symmetric key encryption algorithms include Data Encryption Standard (DES), Triple DES (3DES), Advanced Encryption Standard (AES), International Data Encryption Algorithm (IDEA), Blowfish, and RC4.

Speed: The algorithms used with symmetric encryption are fast, so they have less interference with system performance and are particularly effective with encrypting large amounts of data.

Strength: Symmetric algorithms are hard to decode without the correct algorithm. Well-tested symmetric algorithms such as 3DES and AES are almost impossible to decipher without the correct key. There is a method of taking encrypted data and encrypting it a second or even third time. Some of the disadvantages of using symmetric keys:

  • Poor key distribution mechanism: There is no simplistic method to securely distribute a shared secret; thus wide-scale deployment of symmetric keys is difficult.
  • Single key: A single key or single shared secret. When a single key secret is compromised, the impact is extensive. Because there is a single key that can be shared with some or many, symmetric keys are not suited to provide integrity, authentication, or nonrepudiation.

Some of the characteristics of specific symmetric keys:

View Topics

Our Revolution

We believe Cyber Security training should be free, for everyone, FOREVER. Everyone, everywhere, deserves the OPPORTUNITY to learn, begin and grow a career in this fascinating field. Therefore, Cybrary is a free community where people, companies and training come together to give everyone the ability to collaborate in an open source way that is revolutionizing the cyber security educational experience.

Support Cybrary

Donate Here to Get This Month's Donor Badge

 

We recommend always using caution when following any link

Are you sure you want to continue?

Continue
Cancel