Differentiate asymmetric and symmetric algorithms?

1.	Differentiate asymmetric and symmetric algorithms?
Answer» Symmetric Key Encryption: 1. Same key is used for both encryption and decryption 2. Speed of encryption or decryption is very fast 3. Plain text and cipher text are of same size 4. Algorithms like DES, AES, RC4 uses symmetric key encryption 5. Provides confidentiality 6. The number of key used grows exponentially with the number of users Asymmetric Key Encryption: 1. Different keys are used for encryption and decryption 2. Speed of encryption or decryption is comparatively slow 3. The size of cipher text is always greater than plain text. 4. Algorithms like RSA, ECC, DSA use asymmetric key encryption 5. Provides confidentiality, authenticity and ‘ nonrepudiation 6. The number of key used grows linearly with the number of users

Answer»

Symmetric Key Encryption:

1. Same key is used for both encryption and decryption

2. Speed of encryption or decryption is very fast

3. Plain text and cipher text are of same size

4. Algorithms like DES, AES, RC4 uses symmetric key encryption

5. Provides confidentiality

6. The number of key used grows exponentially with the number of users

Asymmetric Key Encryption:

1. Different keys are used for encryption and decryption

2. Speed of encryption or decryption is comparatively slow

3. The size of cipher text is always greater than plain text.

4. Algorithms like RSA, ECC, DSA use asymmetric key encryption

5. Provides confidentiality, authenticity and ‘ nonrepudiation

6. The number of key used grows linearly with the number of users

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