For example, pay-per-view, annual, or monthly subscriptions are all controlled centrally by scrambling and unscrambling signals based on the payment. It is controlled centrally and only the channels you are subscribed to can be accessed and all other signals are “scrambled” using cryptographic technology. Cryptography provides such a mechanism.Ĭryptography is also used to regulate access to your cable or satellite television. If we make this process computerized, where approval, and other governance is done via network or Internet, then we need a mechanism to authenticate the user’s signature digitally (digital signatures), and provide a digital timestamp. For example, in many governance processes, a signature is an essential part of the process for authentication and maintaining integrity. It is used for checking integrity and authentication processes as well. However, it is not restricted to the confidentiality. Though encrypting e-mail may or may not protect an individual or business completely from government surveillance, it can certainly keep your data safe from intruders who are looking to find useful information from your e-mail.Ĭryptography is mainly used to protect confidentiality of the data.
Hence, companies prefer to use encrypted e-mail for employees–certainly, for senior executives at the very least. E-mails sent in plain text can become a serious problem, as someone could tap the network and read your personal e-mail–something that has become quite common. With the rise in government surveillance of Internet data, which is making headlines every day, people are even more concerned about their privacy and personal data. Cryptography makes transactions on the web more secure through digital certificates, 3-D secure, and other encryption technology. In today’s Internet world, cryptography applications are used to enable digital signatures, money transfers, online shopping, online booking, and credit card payments, where authentication and privacy are crucial. The process uses algorithms known as crypto-algorithms to perform the encryption and decryption process.Įncryption and decryption are done using a “key” or “code.” Sometimes, only one key is used to perform both encryption and decryption sometimes two separate keys are used, one for encryption and the other key for decryption. The typical process of encryption and decryption is illustrated in Figure 8-1.Ĭryptography is the process of converting simple plain text into secret text called ciphertext, and converting ciphertext back to its original simple text, as shown in the Figure 8-1. Once it reaches its destination, the receiver can reverse the process to read the ciphertext. The encrypted data is not readable by others and hence it is secur. The new encrypted text is called ciphertext. The method of disguising plain text to hide the actual data is called encryption. This method of coding a plain text message into a secret coded message is called cryptography.
#WIRE FOR MAC DECRYPTING MESSAGES CODE#
When computer systems can code plain text and the recipient understands and interprets this coded message, users feel more secure transmitting data over the Internet, or any other media. With the increasing use of the Internet as an e-commerce tool, it is important for users, banks, and commercial institutions to make sure that their information is secured and no one is able to read change the data during its transmission. No one else should read the data apart from the one who is sending the data and the authorized receiver. The basic components of Information security are: Confidentiality, Integrity and Authenticity, and Availability.
Information security is the protection of organizational/personal data from unauthorized users. He encrypted his messages by replacing every A with a D, every B with E, and so on, so only the intended recipient could decipher the message. Julius Caesar never trusted his messengers carrying message to his generals. Spies use secret codes to communicate with their secret agents. Information meant for a specific set of eyes must be carefully guarded. It is easy for someone to read data if it is in plain text, and confidential and sensitive messages in plain text can be easily compromised.
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