| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 380269000 | Having compression | 6 |
| 20080212777 | METHODS AND APPARATUS FOR MULTI-LEVEL DYNAMIC SECURITY SYSTEM - Methods and apparatus for converting original data into a plurality of sub-bands using wavelet decomposition; encrypting at least one of the sub-bands using a key to produce encrypted sub-band data; and transmitting the encrypted sub-band data to a recipient separately from the other sub-bands. | 09-04-2008 |
| 20090190760 | ENCRYPTION AND COMPRESSION OF DATA FOR STORAGE - Described is a process for encrypting and compressing data for storage by computing systems. A data stream received by a computing system is separated into data chunks for storage on a storage device using a data layout format. Each data chunk is examined and if possible, compressed to produce a compressed data chunk. Whether or not the data chunk can be compressed, the data chunk is encrypted and stored on the storage device in addition to metadata that describes the data chunk. When reading the stored data chunk from the storage device, the metadata identifies the starting location of the stored data chunk and provides metadata information to the computing system for decryption and decompression processing. | 07-30-2009 |
| 20090202075 | CONDITIONAL ACCESS SYSTEM EMPLOYING CONSTRAINED ENCRYPTION KEYS - A method and apparatus is provided for decrypting an encrypted transport stream, comprising. The method includes receiving the encrypted transport stream over a content delivery network. The encrypted transport stream is encrypted using a first control word that serves as an encryption/decryption key. A variable control word is received over the content delivery network. The variable control word is mathematically constrained to create a second control word. The encrypted transport stream is decrypted using the second control word if the second control word is the same as the first control word. | 08-13-2009 |
| 20100061554 | METHOD FOR THE ALLOCATION AND MANAGEMENT OF SUBSCRIPTIONS FOR THE RECEPTION OF BROADCAST PRODUCTS - A method to reduce the bandwidth for the renewal of subscriptions includes: A) defining a maximum length for a message, B) defining a command for security modules, C) forming a message comprising the command, D) filling the message with a starting address and a range E) determining a remaining length in the message, F) defining a bitmap of variable length, G) starting at identification address equal to the starting address and initializing an index value and the bitmap length, H) updating the bitmap bit for the security module pertaining to the identification address to activate/deactivate the command, I) compressing the bitmap, J) when the compressed bitmap length is smaller than the remaining size in the message, updating the index value, the bitmap length and the identification address and re-executing the steps H to J, K) updating the range with the index value and filling the message with the bitmap. | 03-11-2010 |
| 20100104098 | CRYPTOGRAPHIC METHOD AND DEVICE FOR SCHEDULING AND COMPRESSING MESSAGE BASED ON SECURE HASH ALGORITHM - The present invention relates to a secure hash algorithm (SHA)-based message schedule operation method, a message compression operation method, and a cryptographic device performing the same. The present invention sequentially performs the message schedule operation by using an adder. Also, a memory for storing operation data input for the message schedule operation is used from a 17th round to store intermediate data generated by the message schedule operation. Further, the message compression operation is sequentially performed by using one adder. | 04-29-2010 |
| 20120033812 | SYSTEM AND METHOD FOR DECOMPRESSING AND MAKING PUBLICALLY AVAILABLE RECEIVED MEDIA CONTENT - An apparatus for compressing media content is disclosed. The apparatus divides the media content into at least three predetermined portions, compresses each of the at least three portions using one of at least three different compression algorithms and makes the at least three compressed predetermined portions publicly available. Making the portions publicly available includes, for example, transmitting the portions over a computer network such as the Internet. | 02-09-2012 |
