Question

Define the following terms and security objectives and give examples

Symmetry-key Cryptography

Asymmetric Cryptograph

Access Control

Nonrepudiation

Revocation

Answer 1

Answer is as follows :

Symmetry Key Cryptography :

Symmetric Key Cryptography is a algorithm which is used to unlocking the encrypted and decrypted text. So these algorithms use the same key for encryption and decryption at both ends i.e. sender ans receiver. These are done only with primary key.

These are used when private information is transferred. Diffie hellman key protocol are thset type of cryptographic tools.

Assymetric Key Cryptography :

This is same as Symmetry key but we use different keys for encryption and decryption. One public key ans other one is primary key is used.

Example of such algorithm is RSA etc.

Access Control :

Access control is used at end point devoces of a particular network to enhance the security of private network by restricting the availability of the network resources. These are used as firewall prevent the network from vulnerabilities and viruses etc.

Non Repudiation :

Non Repudiation refers to transferred message has been sent and received by the authorised person. It is ability to ensure that the party that communicate over the network can not deny the authenticity of the document.

Means this is mainly used for authorisation purpose.

Revocation :

In computer science network security, Revocati relates to revocation of digital certificate that is issued to any organisation to work with security protocols to comncommuni over network.

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