Cryptography
- 1. JAYAWANT SHIKSHAN PRASARAK MANDAL’s BHIVARABAI SAWANT INSTITUTE OF TECHNOLOGY & RESEARCH Wagholi, Pune-412207 Department of Computer Engineering Seminar & Technical Communication “CRYPTOGRAPHY” Name of student: Kamble Omkar Dnyaneshwar Roll no: 26 Name of Guide: Prof. Priya Sharma Academic year: 2022-23
- 3. CRYPTO GRAPHY A presentation on cryptography and its elements.
- 4. CONTENTS OF THIS SLIDE o Introduction o What is Cryptography? o Implementation Of cryptography o Architecture of cryptography o Types of Cryptography o Types Of cryptography Algorithms o Conclusion
- 6. ● The Internet or the global Internet is the internationally connected network of computer networks with addresses that are administrated by IANA (Internet address and Naming Authority). ● There are many aspects to security and many applications, ranging from secure commerce and payments to private communications and protecting passwords. One essential aspect for secure communications is that of cryptography. INTRODUCTION
- 8. o Cryptography derived its name from a Greek word called “krypto’s” which means “Hidden Secrets” and graphikos, meaning "written“. o Cryptography is the practice and study of hiding information. o It is the Art or Science of converting a plain intelligible data into an unintelligible data and again retransforming that message into its original form. o It provides Confidentiality, Integrity, and Accuracy.
- 10. o Authentication: The process of proving one's identity. (The primary forms of host-to-host authentication on the Internet today are name- based or address-based, both of which are notoriously weak.) o Privacy/confidentiality: Ensuring that no one can read the message except the intended receiver. o Integrity: Assuring the receiver that the received message has not been altered in any way from the original. o Non-repudiation: A mechanism to prove that the sender really sent this message.
- 16. Symmetric-key Algorithms/ Secret-key Algorithm o Providing data confidentiality by using the same key for encrypting and decrypting data. o Providing Message Authentication Codes (MACs) for source and integrity authentication services. The key is used to create the MAC and then to validate it. o Establishing keys during key-establishment processes o Generating deterministic random numbers
- 17. Asymmetric-key algorithms / public-key algorithms
- 18. Asymmetric-key algorithms / public-key algorithms o Computing digital signatures o Establishing cryptographic keying material o Identity Management
- 19. Hash functions o Providing source and integrity authentication services by generating message authentication codes (MACs) o Compressing messages for generating and verifying digital signatures o Deriving keys in key-establishment algorithms o Generating deterministic random numbers
- 20. PROS AND CONS
- 21. PROS : o Confidentiality - An encryption method can protect data and communications against unauthorized access and disclosure. o Authentication - Information can be safeguarded against spoofing and forgeries using cryptographic techniques like MAC and digital signatures, which are used for authentication. o Data Integrity - Cryptographic hash functions are essential in giving users confidence in the accuracy of their data. o Non-repudiation - A digital signature offers the non-repudiation service to protect against disputes that can develop if the sender refuses to acknowledge receipt of the communication.
- 22. •Even an authorized user may find it challenging to access strongly encrypted, authenticated, and password-protected information at a time when access is vital for decision-making. •Cryptography cannot guarantee high availability, one of the core components of information security. •Selective access control, another essential requirement of information security, also cannot be met by using cryptography. For the same, administrative controls and processes must be used. •The dangers and weaknesses that result from the shoddy systems, methods, and procedures are not protected by cryptography. •Cryptography is not free. Costs include both time and money. • Information processing is delayed when encryption mechanisms are added. • Public key infrastructure must be built up and maintained in order to employ public key cryptography, which needs substantial financial investment. CONS :
- 23. CONCLUSION
- 24. CONCLUSION o We use different types of algorithms to establish security services in different service mechanisms. o We use either private key cryptography or public key cryptography according to requirement. o If we want to send message quickly we use private key algorithm and if we want to send messages secretly we use public key algorithm.
- 25. THANK YOU