Confidentiality using Symmetric Encryption
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The document discusses confidentiality using symmetric encryption, focusing on two primary methods: link encryption and end-to-end encryption. Link encryption secures communication links but has disadvantages, while end-to-end encryption offers user data security and some level of authentication. Additionally, it highlights potential security attacks based on knowledge of communication nodes.
Confidentiality using Symmetric Encryption
- 1. Confidentiality Using Symmetric Encryption Er.Jay Nagar(Cyber Security Researcher) www.jaynagarblog.wordpress.com 1
- 2. Potential locations for confidentiality attacks • Why needed? – Two things we have to decide • What to encrypt and where the encryption function should be located. • Two major approaches to encryption placement : • Link • End to End Confidentiality Using Symmetric Encryption 2www.jaynagarblog.wordpress.com
- 3. Link Encryption • Both sides have encrypted device. • So all traffic over communication links is secured. • Disadvantage: • Each time msg. should be decrypted… • If working with public n/w , the user has no control over the security of the nodes.. Confidentiality Using Symmetric Encryption 3www.jaynagarblog.wordpress.com
- 4. End-to-End Encryption • Both sides carried out encryption process • But encryption takes place over header and user data. • Both shares same key • advantage: • User data will be secure… • It does provide a degree of authentication.. Confidentiality Using Symmetric Encryption 4www.jaynagarblog.wordpress.com
- 5. Traffic Confidentiality • Possible way of security attack • Knowledge of nodes. • Useful in military conflict, commercial applications, etc. • Information we can get: • Identities of partners • How they are communicating • Msg. pattern, msg. length , or quantity of messages that suggest important info is being exchanged. Confidentiality Using Symmetric Encryption 5 www.jaynagarblog.wordpress.com