Graph the linear equation x – 2y = 2 Step 1: x = 0 0 – 2y = 2y = -1 Step 2: y = 0 x – 2(0) = 2x = 2 Step 3: Graph the x and y points (0, -1) and (2,0) Step 4: Draw a line through the two points Step… Continue reading Example 2:
Example Problem:
Graph the linear equation: 2x + y = 2 Step 1: Plug in x = 0 and solve for y. 2 (0) + y = 2y = 2 Step 2: Plug in y = 0 and solve for x. 2x + 0 = 22x = 2x = 1 Step 3: Graph the x and y… Continue reading Example Problem:
Intro to Linear Equations
A linear equation is an equation that describes a straight line on a graph. You can remember this by the “line” part of the name linear equation. Standard Form Linear equations have a standard form that looks like this: Ax + By = C Where A and B are coefficients (numbers) while x and y… Continue reading Intro to Linear Equations
Are ratios the same as fractions?
We often write ratios as fractions, especially to help us to do the math, but are they the same as fractions? Generally ratios are best written as fractions when the second term, called the consequent term, is the total of the set. For example, if we have 8 apples and 12 oranges, our ratio of… Continue reading Are ratios the same as fractions?
Ratios, Fractions, & Percentages
As we discussed in ratios for kids, ratios can be written as fractions. We can do this to help reduce ratios to their simplest form. Here’s an example of using fractions to help reduce the ratio: Reduce the ratio 6:72 to its simplest form 6:72 can be written as the fraction 6/726/72 can be reduced to 3/36… Continue reading Ratios, Fractions, & Percentages
Hierarchy of CA
With vast networks and requirements of global communications, it is practically not feasible to have only one trusted CA from whom all users obtain their certificates. Secondly, availability of only one CA may lead to difficulties if CA is compromised. In such case, the hierarchical certification model is of interest since it allows public key… Continue reading Hierarchy of CA
Certifying Authority (CA)
As discussed above, the CA issues certificate to a client and assist other users to verify the certificate. The CA takes responsibility for identifying correctly the identity of the client asking for a certificate to be issued, and ensures that the information contained within the certificate is correct and digitally signs it. Key Functions of… Continue reading Certifying Authority (CA)
Public Key Infrastructure (PKI)
PKI provides assurance of public key. It provides the identification of public keys and their distribution. An anatomy of PKI comprises of the following components. Digital Certificate For analogy, a certificate can be considered as the ID card issued to the person. People use ID cards such as a driver’s license, passport to prove their… Continue reading Public Key Infrastructure (PKI)
Public Key Infrastructure
The most distinct feature of Public Key Infrastructure (PKI) is that it uses a pair of keys to achieve the underlying security service. The key pair comprises of private key and public key. Since the public keys are in open domain, they are likely to be abused. It is, thus, necessary to establish and maintain… Continue reading Public Key Infrastructure
Importance of Digital Signature
Out of all cryptographic primitives, the digital signature using public key cryptography is considered as very important and useful tool to achieve information security. Apart from ability to provide non-repudiation of message, the digital signature also provides message authentication and data integrity. Let us briefly see how this is achieved by the digital signature −… Continue reading Importance of Digital Signature