written 5.6 years ago by
teamques10
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• modified 2.3 years ago |
Mumbai University > Electronics and Telecomm > Sem 7 > Data Compression and Encryption
Marks: 5M
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written 5.6 years ago by
teamques10
★ 64k
|
• modified 5.6 years ago |
| Symmetric key cryptography | Asymmetric key cryptography |
|---|---|
| In symmetric key cryptography, single or same key is used for both encryption as well as decryption | In asymmetric key cryptography, two separate keys are used, one for encryption and the other for decryption |
| It is also called a secret key cryptography or private key cryptography | It is also called as Conventional cryptography system or Public key cryptography |
| Mathematically it is represented as: P=D(K,E(P)) Where K=Encryption and decryption key P=Plain text D=Decryption E(P)=Encryption of plain text | Mathematically it is represented as:P=D(Kd,E(Ke,P)) Where Ke=Encryption key Kd=Decryption key D=Decryption E(Ke,P)=Encryption of plain text using encryption key P=Plain text |
| It is faster than asymmetric key cryptography | Because of different keys used for encryption and decryption, it is slower than symmetric key cryptography |
| It utilizes less resources as compared to asymmetric key cryptography | It uses more resources as compared to symmetric key cryptography |
| AES and DES are examples of symmetric key cryptography | Diffie hellman and RSA are examples of asymmetric key cryptography |
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