both parties share the same key to encrypt and decrypt
- Symmetric encryption means that an encrypted file can be decoded simply by reversing the way it was coded. If we consider it in terms of a padlocked box, the same key that was used to lock it, can be used to open it once again.
In terms of files this means that if you encrypt a file using a password, that same password can be used by anyone who knows it, to decrypt the data. The disadvantage of this is that whenever you encrypt a file and send it to someone, you must make sure that person also knows the password you used.
This is why asymmetric encryption exists whereby one person can encrypt and send a file to someone else using "public key cryptography". The short definition of this is that encrypted data is not decrypted in the same way which means that there is no need to have a prearranged password.
Symmetric
AES
There are 2 types of cryptography such as: 1- Symmetric-key or Secret key Cryptography 2- Asymmetric-key or Public key Cryptography
There are 2 types of cryptography such as: 1- Symmetric-key or Secret key Cryptography 2- Asymmetric-key or Public key Cryptography
The option that is not a disadvantage of symmetric cryptography is "speed." In fact, symmetric cryptography is generally faster than asymmetric cryptography because it uses simpler algorithms and smaller key sizes for encryption and decryption. The other options—lack of true sender authentication and the risk of compromising multiple parties if one key is broken—are indeed disadvantages of symmetric cryptography.
Math algorithms are complex and can easily be broken
Yes
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Symmetric cryptography only requires one key for both encryption and decryption and therefore in some cases are a issue.
following steps are involved in symmetric cryptography 1- sender creates a ciphertext message by encrypting the plain text message with a symmetric encryption algorithm and a shared key. 2- the sender sends the ciphertext message to the recipient. 3- the recipient decrypts the ciphertext message into plain text with a shared key.
Symmetric cryptography is impractival when a large group is involved.
Symmetric-key algorithms are a class of algorithms for cryptography that use trivially related, often identical, cryptographic keys for both decryption and encryption.