RSA ALGORITHM The full form of RSA is Ron Rivest, Adi Shamir and Len Adleman who invented it in 1977. The RSA cryptosystem is the public key cryptography algorithm . It can be used to encrypt a message without the need to exchange a secret key separately. It can be […]
Monoalphabetic Substitution Cipher in which every alphabet have unique alphabet and we can not use same for another alphabet in cipher text. Polyalphabetic cipher was invented by Johannes Trithemius in the 15th Century. To remove this limitation, Polyalphabet cipher is introduced in which we can use alphabet for any number. […]
QUESTION: An Internet Service Provider (ISP) is granted a block of addresses starting with 145.75.0.0/16. The ISP needs to distribute these addresses to three groups of customers as follows: (a) The first group has 128 customers; each needs 256 addresses. (b) The second group has 128 customers; each needs 64 […]
we will discuss this topic with help of one question asked in CBSE NET JAN 2017 PAPER 3 QUESTION: An analog signal has a bit rate of 8000 bps and a baud rate of 1000. Then analog signal has ………….. signal elements and carry ………… data elements in each signal. […]
This question asked in JAN 2017 PAPER 3 Question 28: In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is …… (1) 2 bytes (2) 1 […]
