6. Symmetric cryptography It uses the same key for encryption and decryption. E.g. DES, 3DES, Blowfish Encrypt using key K Cipher text Sender Decrypt using key K Cipher text Plain text Receiver Send from Sender to Receiver Plain Text
7. Public key cryptography Public key is distributed whereas private key is kept secret. E.g. RSA, DSA Encrypt using B’s public key Cipher text A Decrypt using B’s private key Cipher text Plain text B Send from Sender to Receiver Plain Text
8. Hashing Function Hash Function Message digest Message Eg. a word “Linux conference” becomes EFDD2356. Typical Hash functions have an infinite domain, such as byte streams of arbitrary length and a finite range such as bit sequences of some fixed length.
9. Digital Signatures Hash Function Message digest Encrypt using Sender’s private key Digital Signature Message The message digest which is the hash value is Encrypted and anybody can check the signature using the public key.
10.
11. NETWORKING PRODUCTS DIVISION, HCL Digital Certificates Country Name: State: Locality: Organizational Name: Common Name: E-mail address: Public key Certificate Sign using private key of Self or trusted Certification Authority(CA).