An electronic device for securing Credit/Debit Card transactions in card-present and card-not-present situations

摘要

Text messages may be securely communicated between devices having application software including an encryption algorithm. The encryption key will not be stored in the devices (and so must be memorised by the persons in communication), and messages sent between, or stored on, the devices will only be in encrypted form. The key may be augmented (by repeating its characters, with or without additional characters inserted, to pad out to a required length). The encryption algorithm may be a stream cipher algorithm. The algorithm randomly generates a salt to alter the primitives generated from the key, and the salt is added as a header to the transmitted encrypted message.