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World Aircon

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In order for WA to carry out business transaction through the internet it must always ensure that the transactions are secure. The WA must always use https:// website instead of http:// website, where S indicates that the connection will be secure.. A valid digital signature assures the recipient of the originality of the message i.e. it wasn’t altered while in transit.

Digital signatures are effective in that they provide added assurances of the evidence to provenance identity and status of an electric message and approval by the signatory. They include: authentication, integrity, non-repudiation. In the case of WA it is valid to use sender authenticity since financial transactions requires security. A digitally signed message any change to it after the signature automatically invalidates the message. It is hard to modify a message and its signature hence upholding integrity. Digitally signing is also effective in that it ensures that the entity that signed some information cannot later deny having signed it.

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Symmetric encryption also known as secret key is the well-known. It uses a secret key to a message in order to change its content in a specific manner. It can be a word or a number. Asymmetrical encryption is also known as a public key. A public key is made freely available to anyone who might want to send a message and the second private key is made secret. A message encrypted using a public can only be decrypted by using the private key. A message encrypted by a private key can only be decrypted by using the matching public key. Asymmetric encryption is slower than the symmetric one since it requires more processing power.

Symmetric encryption would be the best form of key exchange for WA to use since it is more secure and efficient in terms of speed. WA is likely to face the following challenges: challenge of understanding the trust relationship between the different entities involved in a protocol, scalable cryptographic primitives, and creating a room for changes in the electronic payment sequence.

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