Family The symmetric encryption is a method of cryptography in which the same key is used both to encrypt and decrypt information. It is one of the oldest systems and also one of the fastest and most efficient.
In this type of encryption, the sender and the receiver must previously share a secret key. The sender takes the original message (plain text), transforms it using the key into an unreadable message (encrypted text), and then the receiver uses that same key to retrieve the original message.
A simple example would be like having a lock: whoever has the key can close (encrypt) and open (decrypt).
Among the most well-known symmetric encryption algorithms are:
AES: widely used today (banks, internet, applications).
DES: was very popular, but is now considered insecure.
RC4: used in the past in internet protocols, although it is no longer recommended.
Advantages:
Very fast and efficient.
Ideal for encrypting large amounts of data.
Disadvantages:
The main problem is how to share the key securely.
If someone obtains the key, they can access all the information.
Blessings and success
Thank you for following me 🫂