Tips for Guiding Against Credit Card Security

Credit card fraud is on the increase today. The truth is that fraudsters are becoming smart nowadays and you need to be shrewder in order to beat them. Here are tips to help avoid them.

Use chip embedded cards

The credit card companies nowadays issues card embedded with chips. These types of cards are more secure than the previous magnetic strips. This is because the security codes used by chips embedded cards are difficult to guess. Besides, it is not easy to fake the cards because the codes change at the completion of every transaction. So, if you are still using cards with magnetic strips, kindly request for a replacement from your bank.

Use different cards for online and in-store purchases

If you shop online and offline, it is advisable that you have two credit cards for each of these types of transactions. The reason for this is quite obvious. When one is compromised, you will still have the other intact and the risk of losing a lot of money is minimized. But when you have all your money in one card and it is compromised, it will be a huge loss to you.

Use PIN that is difficult to guess

Many people make the mistake of using PINs that are very easy for people that know to guess. You may think that it is not easy to guess any PIN since no other person except the users knows it. But experience has shown that people can succeed in guessing PINs correctly. Avoid using your birthday, wedding date, social security number or any other number that has to do with an important date in your life. This is because these are the numbers that people that know you will try first when they want to guess your PIN. So, use numbers that have nothing to do with any events in your life.

Guard your PIN jealously

When entering your PIN for the payment of your purchases, it is very important that you guard it making sure that the person nearest to you does not see it. PINs are not lengthy and so, they are easy to memorize.

Beef up your account security

Enhance your card security using any acceptable means possible to you. Set transaction notification on your online account. Choose both text messages and email notification. In this way, you will know when your credit card has been compromised or when an unauthorized order has been placed with your credit card. Once, you get a transaction alert not authorized by you, report immediately to your bank.

Another ways of boasting your account security is to set the limit of payment that can be made at a time with your credit. In that case, your account will be locked if the limit is exceeded within a day.

You should also use checkbin tools.

Don’t use public Wi-Fi

Don’t log into your account using public Wi-Fi in places like hotels and universities. Similarly, you should also avoid accessing your account with a public computer or another person’s computer. A good number of hotels use Wi-Fi that does not have end-to-end encryption. This means that the data you give with your device be it a laptop, tablet or smartphone can be retrieved by any person.

Online Security: Remedies against Internet Threats

If you are surfing the internet for any reason or you are running an online business, there are some remedies and programs you can use to protect your business against cyber criminals and beef up your online security. Here are some of them.

Internet Protocol Security (IPsec)

IPsec is developed by the Internet Task Force (IETF) to secure TCP/IP communication properly. It is a set of security extensions that uses encryption to transform data in order to secure and authenticate the IP layer. IPsec is based on two major transformations, namely, ESP and Authentication Header (AH). One or both of these protocols can be used depending on the security service required for the protection of the IP layer.

Network layer security

You can secure your TCP/IP protocols with security protocols and cryptographic methods such as IPsec for the network layer security, (PGP) for email, (TLS) for web traffic, Transport Layer Security, Secure Sockets Layer (SSL), Pretty Good Privacy and others.

Security Token

Security token is normally provided by some sites to their visitors against the activities of criminals. These sites allow users to make use of a six-digit code which on a security token changes in every 30-60 seconds. The security token has keys which feature mathematical computations and are capable of manipulating numbers based on the system’s current built in time. With this approach, access can only be granted to the online account with certain set of numbers after every thirty seconds.


This is a part of network or computers that allow outward communication but prevent any unauthorized access.

Antivirus software

These are programs designed to secure and defend computers against the attack of dangerous programs such as viruses.

Others are:

Electronic mail security

Pretty Good Privacy

Multipurpose Internet Mail Extensions

Message Authentication Code

How SMTP Works?

Many people today send and receive emails. It is one of the fastest means of exchanging information in vogue today. However, only a few people that use it know how it functions. SMTP which is an acronym for simple mail transfer protocol (SMTP) is the standard for the internet that makes email possible. Here you’ll learn more about Simple Mail Transfer Protocol (SMTP).

What is Simple Mail Transfer Protocol?

Simple Mail Transfer Protocol shortly called SMTP refers to the protocol utilized when electronic mails are being sent from client to the receiver. It makes the transfer of e-mails from clients’ servers to the recipients’ servers and vice versa possible. SMTP which works with TCP well Known port 25 is the application level protocol that deals with message service over TCP/IP networks. It was in 1981 that the protocol was defined in RFC 788 for the first time. But it was revised in RFC 821 and RFC 822 in 1982. The 821 and 822 definitions were also revised and released in 2001 as RFC 2821 (SMTP) and RFC 2822 (internet message format) respectively.

How does SMTP work?

When you buy SMTP, it delivers message from one end to another. When a client click on the “send button” of your email in order to send an email to a person, the server on the internet/network will be connected to by the email program. This server to which the program connects to is what is referred to as the SMTP server. In other words, the client’s SMTP server will contact the recipient’s SMTP server on well-known port 25 in order to send your email. The client will wait for a 220 Ready for Mail message to be sent by the server. The client will send a Helo command when the 220 message is received and a 250 requested mail action okay message will be sent by the server in response.

The email delivery will start with a mail which assigns an identification to the Sender. It will also give a FROM field (the address to which errors are reported is contained in this field). After the MAIL command is successfully executed, a series of RCPT commands will be issued by the sender. The mail message of the recipients will be identified by these series of RCPT commands. Each of these RCPT commands will be acknowledged by sending 250 OK. If there is no user, the error message will be sent.

The sender server will issue a DATA command when all the commands have been acknowledged  to the receiver’s server informing it of the readiness of the sender to deliver a complete mail message. With a message 354 Start mail command, the receiver will respond. It will also provide sender an ending sequence to use in order to end the message data. 5 characters are contained in the termination sequence and they include line feed, carriage return, period, line feed and carriage return (<CRLFY>.<CRLF>).

The data will not be sent by the client server line by line. The receiving server either acknowledges with a 250 and sends an error message when there is something wrong.

At the click of the QUIT command, connection can be closed if there is no more messages to be delivered by the current simple mail transfer protocol client. Through a 221 service closing transmission channel reply answer will be provided.

The entire process is very fast.