Cryptography and system security notes

  • Types of cryptography

    Cryptography is used to protect the private information shared between two communicating parties from a third party.
    Confidentiality, Data Integrity, Authentication, and Non-Repudiation are the main principles of cryptography.
    Network security is the actions taken or procedures followed to protect the computer network..

  • What are the basics of security and cryptography?

    Cryptography is used to protect the private information shared between two communicating parties from a third party.
    Confidentiality, Data Integrity, Authentication, and Non-Repudiation are the main principles of cryptography.
    Network security is the actions taken or procedures followed to protect the computer network..

  • What is cryptography and network security notes?

    Cryptography The art or science encompassing the principles and methods of transforming an. intelligible message into one that is unintelligible, and then retransforming that message back to its. original form.
    Plaintext The original intelligible message.
    Cipher text The transformed message..

  • The CIA triad refers to an information security model made up of the three main components: confidentiality, integrity and availability.
    Each component represents a fundamental objective of information security.
Security service – A service that enhances the security of the data processing systems and the information transfers of an organization. The services are 
The classification of security services are as follows: Confidentiality: Ensures that the information in a computer system and transmitted information are 

Variant of ID-based cryptography

Certificateless cryptography is a variant of ID-based cryptography intended to prevent the key escrow problem.
Ordinarily, keys are generated by a certificate authority or a key generation center (KGC) who is given complete power and is implicitly trusted.
To prevent a complete breakdown of the system in the case of a compromised KGC, the key generation process is split between the KGC and the user.
The KGC first generates a key pair, where the private key is now the partial private key of the system.
The remainder of the key is a random value generated by the user, and is never revealed to anyone, not even the KGC.
All cryptographic operations by the user are performed by using a complete private key which involves both the KGC's partial key, and the user's random secret value.

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