An apparatus and methods for facilitating a reduction in data transmission bandwidth removes unnecessary data relating to encryption keys prior to sending a message or storing the encrypted information for a recipient. Encrypted data, such as message data for multiple recipients, is analyzed to determine...http://www.google.co.uk/patents/US6567914?utm_source=gb-gplus-sharePatent US6567914 - Apparatus and method for reducing transmission bandwidth and storage requirements in a cryptographic security system
