The Great Ink Cartridge Conspiracy!Written by Pronto Ink
Buying an inkjet printer these days is no big deal. A reliable printer can be acquired very easily through a store or online for as little as $50. Some suppliers are even giving away inkjet printers on promotions or as free incentives when buying other products. On face of it, it seems like too good an opportunity to pass by - a worthwhile investment you might say. But, much like a traditional camera that uses film, an inkjet printer is only 'cheap' before you start using it. The cost of keeping it in ink soon mounts up, especially when you're buying OEM (original equipment manufactured) inkjet cartridges as recommended by printer manufacturer. Before you know it you'll find that you've actually spent more on ink cartridges than you did on purchase of inkjet printer itself! If you're in this position - and let's face it, most of us are - what follows could be quite a revelation! Five things inkjet printer manufacturers DON'T want you to know… 1. Inkjet printer manufacturers make their money selling ink cartridges NOT inkjet printers Selling recommended OEM ink cartridges is a very lucrative business for inkjet printer manufacturers. They know that once you've purchased printer you'll be coming back to them time and time again to buy ink that they recommend in user guide and any other literature that accompanies printer. Fair enough you might say, but given that price of manufacturing an OEM ink cartridge is only a few cents why are cartridges so expensive? The answer is that ink cartridges are in fact stuffed full of manufacturer profit. It is where they make their money, and is precisely why they are happy to give away an inkjet printer for nothing.
| | Overview of XML EncryptionWritten by Pawan Bangar
XML encryption classifies a course of action for encrypting plain text data, generating ciphertext, and decrypting ciphertext to retrieve plaintext data.Both and are optional i.e. sender and receiver may agree on encryption method and key in advance. Several elements use definitions from DSIG. If recipient does not know decryption key in advance, then sender generates and sends it. The key can be protected in transit by encrypting method or key agreement. If plaintext data to encrypt is an XML element or content, you encode it using UTF-8 and perform any necessary transforms to it, otherwise, if it is an external resource, you simply consider it as an octet sequence. You then encrypt data, creating CipherValue, which you place in EncryptedData. Care must be taken when signing content that may later be encrypted; clearly; content must be restored to exactly original plaintext form for signature to validate properly. To restore plaintext in signed content, use decryption transform method for XML signature defined by XML encrypt joint W3C and IETF working group. This transform also allows specifications of XML fragments that were encrypted and then signed with rest of document and, therefore, are not decrypted to validate signature. Often, encrypted fragments are removed from signed information by using XPATH transform in reference element, since meaningful information is plaintext. We can sign plaintext version of an encrypted element by including appropriate reference element pointing to it. When signed document is confidential and encrypted after being signed, you should also protect against surreptitious forwarding in which recipient forwards signed confidential document to a competitor, encrypted by competitor public key, trying to make it look as if sender sent confidential information. To prevent surreptitious forwarding, signer should append recipient identities to document being signed.
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