The document discusses key management and distribution in cryptography. It covers topics such as key generation, the different types of keys including symmetric and asymmetric keys, how symmetric and asymmetric encryption works, different methods of key distribution including public key distribution and private key distribution, and an overview of public key infrastructure. The goal of key management is to support the establishment and maintenance of secure key relationships between authorized parties.

1. Key Management and Distribution
Presented by
Syed Bahadur Shah
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2. PRESENTATION CONTENTS
1. Key Management
2. Key Generation
3. Type of Keys
4. Key Distribution
5. Types of Key Distribution
6. Public Key Infrastructure
7. Question & Answer Section
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3. What is Key Management?
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4. What is Key Management?
Key management is the set of techniques and procedures
supporting the establishment and maintenance of keying
relationships between authorized parties.
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5. What is Key Generation/Establishment?
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6. What is Key Generation/Establishment?
Key generation is the process of generating keys for
cryptography. The key is used to encrypt and decrypt
data whatever the data is being encrypted or
decrypted.
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7. Types of Keys in Cryptography
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8. Types of Keys in Cryptography
1. Symmetric Key
2. Asymmetric Key
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9. Symmetric Key
Symmetric key is (also called “secret key / private key /
conventional key / single key”) use the same key for
both encryption and decryption.
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10. Asymmetric Key
Asymmetric key is (also called “public key / two key”)
use different keys for encryption and decryption.
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11. Symmetric Key Encryption & Decryption
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12. Symmetric Key Encryption & Decryption
An algorithm in which the sender and receiver of a
message share a single, common key that is used
to encrypt and decrypt the message.
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13. Asymmetric Key Encryption & Decryption
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14. Asymmetric Key Encryption & Decryption
An algorithm in which the sender and receiver of a
message share different keys (public key & private
key) that is used to encrypt and decrypt the
message.
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15. What is Key Distribution?
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16. What is Key Distribution?
Key distribution in cryptography is a system that is responsible
for providing keys to the users in a network that shares sensitive
or private data.
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17. Types of Key Distribution
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18. Types of Key Distribution
 Public Key Distribution
1. Public Announcement
2. Publically Available Directory
3. Public Key Authority
4. Public Key Certificate
 Private Key Distribution
1. Simple Secret Key
2. Secret Key with Confidentiality & Authentication
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19. Public Key Distribution
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20. 1# - Public Announcement
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Alice Bob

21. 2# - Publically Available Directory
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Alice Bob

22. 3# - Public Key Authority
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Alice Bob

23. 4# - Public Key Certificate
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Alice Bob
Alice Bob

24. Private Key Distribution
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25. 1# - Simple Secret Key
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26. 2# - Secret Key with Confidentiality & Authentication
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27. What is Public Key Infrastructure?
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28. What is Public Key Infrastructure?
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Public Key Infrastructure (PKI) is a framework that helps identify and solve these
problems for you, by establishing safe and reliable environment for electronic
transactions in the internet.
It uses public key encryption techniques to protect the confidentiality, integrity,
authenticity and non-repudiation of data.

29. How Public Key Infrastructure Works?
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30. How Public Key Infrastructure Works?
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AliceBob

31. How Public Key Infrastructure Works? (Cont:)
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32. Question & Answer Section
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