Without cryptography sending data would be very risky due to attacks and third parties tapping into communication channels. Here we will be highlighting cryptography basics.
From online banking transactions to online shopping, cryptography plays a major role in protecting user data from attacks and manipulation by use of encryption techniques.
What are the different types of cryptography?
Cryptography is divided into two major types; symmetric and asymmetric.
Symmetric cryptography makes use of a single key to encrypt and decrypt data and information being shared over the network. Both the sender and the recipient need to have the same key to be able to communicate securely.
Asymmetric cryptography uses two keys in its operation. Both the parties have a common public key and also a private key that is unique for each. This technique is preferred as it offers better type of security compared to the later one.
Note that each of them is used for specific situation to transmit and storage of data and information securely. Hence you should decide on the one to use for your case in order to ensure maximum protection and privacy of information.
What is cryptography and encryption?
Cryptography is the art of writing hidden messages by concealing the actual message from unintended parties by using various techniques like, letter shifting and other complex techniques covered in our ciphers section. Encryption is the actual method used to scramble the message so it does not make sense to someone without the key. An encrypted message needs both the key and cipher used for message to be known by the right target.
1) What is cryptography in computer network?
Data and information being transmitted over computer networks is at a risk of being uncovered and altered by hackers hence encryption is paramount. Data is encrypted before it is transmitted over the network.
For example it would be impossible to buy something online without providing your credit card details. In this case your money would be at a risk of getting in hands of attackers thus the use of cryptography through SSL to protect user data over HTTP protocol becomes very important.
2) What are the techniques of cryptography?
These are all the techniques used to encrypt data and make it unreadable to unintended parties they include; Affine, atbash, baconian, base64, bifid, caesar, gronsfeld, morse code, playfair and one time pad.
What is the meaning of quantum cryptography?
Quantum cryptography gets its strength from the examination of reality at small scales. Data and information in quantum world has the ability to be able to simultaneously exist in more than one place or state at the same time. When data encounters something different it changes or when there has been a change or manipulation of its properties.
What are the substitution techniques in cryptography?
Substitution is a basic type of code, ie cipher. Basically you have to replace every letter with another letter, color, symbol, number or even a picture.
What is monoalphabetic cipher with example?
A monoalphabetic cipher uses fixed substitution for the entire message, unnlike a polyalphabetic cipher which uses a number of substitutions at various positions in the message, where a letter from the plaintext is mapped to one of every possibilities in the ciphertext.
For example in a monoalphabetic cipher letter A would be substituted to letter S throughout the message while in a polyalphabetic cipher letter A would be letter S at the beginning of the message but at the end the same letter would be different.
How do you break a cipher?
The basic tools to breaking any encrypted message involves a few steps. First you need to know the type of cipher used to encode the message. Secondly you need to know the key use to encrypt the data. With these two breaking any encrypted message is very easy with right tools. I would recommend using an encryption software to encrypt and break ciphers as some can be very complicated and time consuming
3) How do you solve a cipher?
Solving a cipher involves using message decryption tools for a given cipher. In addition to having the right tools you also need the message to be decoded and the key used to encode the message.
The key is important in decoding as there could be unlimited possibilities used in that particular cipher. In case of one time pad, the pad used is very vital in decoding the message to the original, otherwise it can be very hard to arrive at the message
Here is the whole set of cipher tools to encrypt and decrypt messages.
How do you solve a cryptogram?
This is a kind of a brain puzzle where D could be F, G could be R, R could be T, etc. A cryptogram is commonly called a crytoquip in local newspapers. First you have to define a key to be used. Note that any capital letters that you define will be changed to their lowercase equivalents.
What is cracking a code?
Code cracking refers to trying all possible combinations and ciphers to decode ciphertext for malicious reasons. This is commonly used for spying on individuals and competitors and crippling their operations. Brute force attack is a method used to crack codes for a given system or cipher.
What is a cryptogram example?
Check out this Cryptogram Cipher Encryption and Decryption Tool to help you understand how it works to protect data and information. Switch a few letters with different once in the alphabet to encode your message.
What is the meaning of cryptology?
Cryptology is a branch of cryptography and also cryptanalysis, it deals with all the mathematics such as number theory and application of algorithms and formulas to solve problems.
That’s the basics of cryptography. Other topics like cryptanalysis are a bit complex and are covered in other posts.