MXPA06010215A - Cross-encoding of information in independent channels - Google Patents

Abstract

Independent first and second information signals (contentl and conten2) are transmitted over separate independent physical channels to a receiving location. Security is provided by encoding (12a) at least the first information by means of the second information to produce encoded signals (1',…, N'). The encoded signals and the second signals are received from the first and second channels at the second location (230). The encoded first signals are decoded at the receiving location by processing with the second signals. In some embodiments, the second information signals are encoded by processing with the first information signals. In a more general case, plural channels of information are°cross-encoded"by the information in plural other channels, and the plurality may be large.

Description

CROSSED CODING OF INFORMATION IN INDEPENDENT CHANNELS FIELD OF THE INVENTION This invention relates to the codification of information, and more especially, to the coding of first information that crosses a first channel in a location by means of the second information that crosses in the second channel towards the location.

BACKGROUND OF THE INVENTION Current radio and / or television services often provide pay-per-event or conditional access to the content of a program. Users who do not pay to receive the content can not receive the signals by coding and often, by encryption, the signals that contain the content. The term "encoding" is used here to encode, scramble and encrypt and "decode" is used for decoding, decryption and decryption. Paid customers receive a decoding key so they can decode the encoded content for use. Unfortunately, some people can receive the coded signal and extract the key, either online or offline, and thus avoid passing the fee for the use of the content. Figure 1 is a simplified block diagram of a cable television system 10 including a subscriber. In the system of Figure 1, the video or music content 1, which will be available on a per-event basis, is applied to an encoder 12a. The encoder 12a encodes the content with the help of a key produced by a key generator 14a, which is applied to an input port 12ai, to produce the first content. The first coded content produced by the encoder 12a is applied to a frequency upconverter 16a, which converts the frequency into a single frequency range or channel, centered on a frequency f1. The second content 2, which is available to all subscribers, is directly applied to a second frequency upconverter 16b, which converts the uncoded content into a second unique frequency range. The system 10 of Figure 1 includes other frequency converters and may include other encoders, such as the encoder 12N encoding the content N by means of a key, which may be the same key that was used for the encoder 12a, or may be a different key from the 14N generator, applied to its port 12Ni encoding input. The encoded output of the encoder 14N is applied to a rising converter 16N for conversion into a frequency interval fN, different from other frequency ranges. The encoded and uncoded signals at frequencies f1, f2, ... fN are applied to a frequency-sensitive combiner 18 that combines the signals in a single path, which is the path or line 20 of television transmission of the system ( which can be a coaxial cable or an optical fiber).

The different carriers at different frequencies f 1, f 2, ... f N flow along the cable 20 to the subscribers. It should be understood that each separate carrier frequency in the cable system 10 constitutes a single channel carrying only one content. At any location of the particular subscriber, a portion of the signal including the carriers f 1, f 2, ... f N is removed from the transmission path 20, as by a directional coupler 22 and is carried to the location of the subscriber, designated 24 in Figure 1. At the subscriber, the signal is available, either directly to a television receiver 26, or when the carrier frequencies of the system are different from the conventional television carrier frequencies or when the decoding of the content is desired, the The signal is made available to the television receiver 26 by means of a receiver / decoder 30. The receiver / decoder 30 receives only one channel, so that it receives a single channel from the cable. When the subscriber at location 24 wants to see unrestricted content, the television receiver 26 or the receiving portion of the receiver / decoder 30 is adjusted to select the appropriate frequency ranges that flow in the transmission path 20 (the desired channel), and the content can be seen or heard without further ado. . When the subscriber wishes to use the restricted, conditioned content, the television receiver 26 (or monitor) or receiver portion of the receiver / decoder 30 is set to select the appropriate frequency ranges that flow in the transmission path 20. However, it is not enough to allow you to use the content. In order to use the restricted, conditioned content, the subscriber can obtain an appropriate decoding key to be used when operating the decoding algorithm in his / her receiver / decoder. Many methods are known to obtain the key, such as the purchase of a card in a computer store. One way to obtain a key is for the subscriber to use a television to call a service center affiliated with the cable company, the fee is identified and paid, and the key is received electronically on the transmission path 20 of the cable. Figure 1. Some people may try to get the use of restricted content, conditioned by storing the encoded content in a memory associated with a computer, and use the computer's processing power to try to determine the key or encryption algorithm. In Figure 1, a sample of the signal received from the receiver / decoder 30 at location 24 is made available to a computer 34. The computer 34 can be used to store the key transmitted on the path 20, the encoded signal received by the receiving portion of the receiver / decoder 30, or both. With the key and / or the stored signal, they can be manipulated by the algorithms of the computer to try to extract the algorithm, key or both of coding. With that information available, the content of encrypted information is available to the subscriber at location 24, regardless of whether he has paid for the content. Improved methods are desired for the protection of information against unauthorized use.

BRIEF DESCRIPTION OF THE INVENTION A method according to an aspect of the invention is to securely transmit first information from a first location to a second location by means of a first channel. The method comprises the steps of, in the first and second locations, acquiring a second information and additional information that is independent of the first information, and aligning in time the second information and the additional information in both the first and second locations. In the first location, the first information is related to the second information and to the additional information by means of a first function in order to generate a transmit signal for its transmission and the resulting signal is transmitted from the first location to the second location by means of a first signal channel. In the second location, the transmit signal is related to the second information and to the additional information with a second function, which is the inverse of the first function, in order to recover the first information. In a particular mode of the method, the first and second functions are XOR functions. The step of acquiring the second information and the additional information in the second location may include the steps of receiving the second information and the additional information by means of independent and individual signal channels. In a particularly advantageous version of this method, at least some of the second information and the additional information is transmitted from the first location to the second location. The step of transmitting at least some of the second information and the additional information from the first location to the second location can be realized by means of at least one signal channel independent of the first signal channel. The step of transmitting at least some of the second information and the additional information from the first location to the second location can be carried out by transmitting each of the second information and the additional information by means of a single signal channel. independent of the first signal channel for each individual of the second information and additional information. In a particularly advantageous version of the method, the step of at the second location relating the transmitting signal with the second information and the additional information with a second function, is performed together with a receiver with the ability to simultaneously receive multiple channels including the first signal channel and signal channels for each individual of the second information and of the additional information. A method according to an aspect of the invention is to securely transmit first and second information from a first location to a second location. The method comprises the step of processing the first information by means of at least the second information in order to generate the first information processed. The second information is processed by means of at least the first information in order to generate the second information processed. The first and second processed information are transmitted separately by means of a first and second independent channels, respectively, to the second location. In the second location, the first information processed is processed inverted with the use of at least the second information processed. The reverse processing of the second processed information can be done with the use of at least the first processed information. In a particular mode of the method, the step in the second location of processing in inverted form the first processed information with the use of at least the second processed information includes the step of receiving, independently, the first information processed from the first independent channel and receive, independently, the second information processed from the second independent channel. In a preferred mode of this method, this last step is carried out in or by an integrated circuit. In accordance with another aspect of the invention, a receiver is provided to simultaneously retrieve, at least the first information received in a processed form, by means of a first independent physical channel and the second information by means of a second independent physical channel. The first information transmitted on the first physical channel is processed before its transmission together with the second information to generate the processed or coded information. The second information is transmitted to the receiver on a second independent channel. The receiver comprises means for receiving the first information processed from the first physical channel and also comprises means for receiving the second information from the second independent channel. A processing means processes the first information processed together with the second information to extract the first information from the first processed information. In the case where the information transmitted on the second channel is coded to form the second processed information, the processing means also extracts the second original information, and for this purpose, the receiver comprises another processing means for processing the first processed information. with the second information to extract the information related to the shape of the second information before processing with the first information. In a preferred embodiment of this receiver, all or most of the functions are contained or are in a single integrated circuit.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a simplified block diagram of a "cable television" system similar to the prior art, with a subscriber connection of the cable signal to a computer. Figure 2 is a simplified block diagram of a cable television system similar to that of Figure 1 and including connections related to the invention; and Figure 3 is a simplified block diagram representing an alternative connection arrangement for a portion of Figure 2.

DETAILED DESCRIPTION OF THE INVENTION The invention makes use of the multiple physical channels, corresponding, in the case of a cable television system, to separate the channels (separated from frequency). In accordance with one aspect of the invention, the coding of the restricted, conditioned content flowing in a channel is carried out with the use of information flowing in another channel of the system. In Figure 2, a cable television system 210 is similar to the system of Figure 1. An outstanding difference between the arrangement of the Figure 2 by comparison with that of Figure 1 is that the key generators 14a, ... 14N of Figure 1 are not used in the arrangement of Figure 2. Instead, each encoder 14a, ... 14N receives , in its coding stream, the information content of another channel. More particularly, in the arrangement of Figure 1, the first encoder 12a receives at its encoding signal input port 12ai, the content of clear N information and the encoder eNew 12N receives on its port 12Ni encoding signal input the content 1 of clear information. As in the arrangement of Figure 1, the content 1 'of information encoded from the encoder 12a becomes upstream and is applied at a frequency f1 to the transmission path 20 by the combiner 18. Independently, the Clear or uncoded becomes upstream and is left available at the frequency f2 on the transmission path 20, and the encoded N 'content of the encoder 12N becomes upstream by the upstream converter N, and is left available to the function fN in the transmission path. At location 24 of the subscriber of Figure 2, the combined signal from the transmission path 20 is made available by means of a steering coupler 22. Unlike the arrangement of Figure 1, the receiver array 230 of Figure 2 includes a set 240 that includes a plurality 240a, 240b, .. 240M of individual receivers, each with the ability to receive content from an independent physical channel. . The number of individual receivers in the receiver array 230 depends on the number of channels that are used to perform the encoding. Thus, in the arrangement illustrated in Figure 2, the encoder 12a encodes the content channel 1 with the information of the content channel 3 and the encoder 12N encodes the channel N of the content with the information from the content channel 1 . In this way, only one additional channel of information is needed to decode the content 1 or the N content, so that only two receivers 240a, 240b (or 240a, 240M or any other set of two receivers) are needed to produce the two channels of content. When the content channel 1 information was to be encoded by means of five to ten information from other channels, then array 230 of the receiver of Figure 2 will require six or eleven receivers, respectively, (one for the content channel , five or ten for the coding information).

The dosed content of the desired number of receivers of the set 240 of individual receivers of the receiver array 230 is applied to a decoder illustrated as a frame designated 242. The decoder block 242 decodes at least one of the contents, such as the content 1 It also has available, in the particular coding arrangement illustrated in Figure 2, the information required to decode two individual contents. That is, since the content of channel 1 is encoded with content N and content N is encoded with content channel 1, receiving both content encoded channels allows decoder 242 to decode both information channels. At least one decoded content is made available from the decoder 242 of Figure 2 for the television receiver 26. In the arrangement of Figure 2, an unscrupulous subscriber who wishes to extract the encoded signal or "the key" faces the difficulty that he does not know the way to perform the encoding. Secondly, it has access to the connection of its computer 34 only with two possible connections (without disturbing the receiver array 230). The first possible point to which your computer can connect to its 230th outgoing terminal of the receiver 230. In this location, it has available the encoded content or the decoded content if it has paid and the decoding information has been downloaded into the receiver array 230. Presumably, the encoded content is not useful to him. When you have paid the fee, then do not try to extract the "key". In an ideal situation, the "key", which information about the related channels for coding, can change from program to program, so that the current "decode" key is not useful for the next program. The second possible connection that the subscriber can make is by means of a coupler or address socket, illustrated as 33, with all the separate physical channels flowing in the cable 20. These physical channels are manifested in the form of separate carriers. While the subscriber may have a receiver, it is likely that it is not a multi-channel receiver, such as the receiver of the array 230 of Figure 2. Accordingly, even with a single channel (RX) receiver 35 connected to the socket 33 of Figure 1, and with an encoded information channel available in the computer for analysis, it will be very difficult to carry out the analysis to discover the coding, since some relevant information is in another channel and is not available for the computer 34 of Figure 2. A possible method to encode the different content channels is by exclusive processing (XOR). As an example, of the possible coding with the use of multiple information contents, four streams At, Br, Ct and Dt of information content should be considered. The At current of information bits is replaced by a current Ar = At XOR Ct, the bitstream Bt is replaced with Br = At XOR Bt; the current Ct of bits is replaced with Cr = Bt XOR CT XOR DT, and the current Dt of bits is replaced with Dr = At XOR DT. As mentioned, the content that is used for encoding can change from time to time, which can be implemented in this example by changing the XOR method. In array 230 of the receiver of Figure 2, the digital packets are aligned in time appropriately to compensate for differences in arrival time, which may occur for example, due to differences in the group delay of the cable system and the filters of the receiver at different frequencies. When aligned in time, the original information content is recovered or reconstituted by: Original bit stream At = Ar XOR Br XOR Cr XOR Dr; Original bit stream Bt = Ar XOR CR XOR Dr; Original bit stream Ct = Br XOR Cr XOR Dr XOR Dr; and Original bit stream Dt = Ar XOR Br XOR Dr.

It should be noted that a characteristic of the XOR operation is that the order in which the steps are performed does not affect the result. A similar algorithm can be employed over time in a single stream either before or after the transponder application (or both) to add security. It should be noted that some channels can be sent in the clear and still be used to hide or encode the information in another bit stream. This is illustrated, in one form, in Figure 3. In Figure 3, the encoder 12a receives the content 1 for its encoding, and receives the content 2 in its encoding signal input port 12ai, to process the content 1 to produce the processed 1 'content for its apiication to a first upconverter 16a. The information content 2 is applied to an upconverter 16b without the coding, so that it is transmitted in the clear. As another example to send some information in the clear, but it is used to hide information, suppose that At = Ar, and Bt = Br are sent in the clearing. Then, the coding can be carried out by making the transmitted bit streams. Cr = At XOR Ct XOR Bt; and Dr = At XOR Ct XOR Dr. The receiver array 230 of Figure 2 reconstitutes the desired bit streams as: Original bit stream At = AR; Original bit stream Bt = Br; Original bit stream Ct = Ar XOR Br XOR Cr; y Original bit stream Dt = Br XOR Cr XOR Dr; It should be noted that the error correction codes normally used in time can be used in transponders or physical channels for error control and for security. Figure 4 illustrates the logical flow in a digital satellite data transmission system. As illustrated in Figure 4, the information flows to a transport formatter (not illustrated) via a path or node 410 to a block 412, which represents an encoder of the Reed-Solomon type. After coding, the information flows through the path or node 414 to the byte deinterleaver illustrated as block 416. The deinterleaved information flows through the path or node 418 to a convolutional coder illustrated as block 420. the information encoded in convolutional form flows via the path or node 422 to a quadrature phase shift key (QPSK) type modulator. The modulated information is linked in ascending with a satellite, as suggested by block 426, and is unlinked in descending with a 428 QPSK demodulator. The demodulated information from the demodulator 429 is applied via the path or mode 430 with a convolutional decoder 432. The decoded information from block 432 is applied by means of a path or node 434 to a byte deinterleaver, illustrated as block 436. The deinterleaved information from deinterlacer 436 is applied via a path or node 439 to another block 440 encoder, which can be of the Reed-Solomon type. The information leaves the encoder 440 for a transport distorter (not shown) by means of a path or node 442. The paths or nodes 410, 414, 418 and 422 represent alternative locations where the dependency between channels or nodes can be introduced. multiple channels to the system, and the paths or nodes 430, 434, 438 and 442 represent the mutually alternative locations in which the dependency between channels can be removed and the independent channel bits are obtained. Figure 5 is a simplified block diagram of a general communication system in accordance with an aspect of the invention, which includes a transmitting portion and a receiving portion. In Figure 5, the bits l0 to be secured are applied via the path 510 with a block 520 of logical function and with a block 516 of packet alignment. The additional bits ln and l2 of other data streams are applied by means of paths 512 and 514, respectively, with the packet alignment block 516 and the transmitters (XMTR) 524 and 526. The packet alignment block 516 aligns the packets \ -e l2 in time or makes them concurrent with the packets l0 and applies the packets to a function block 520 for encoding the packets l0 with the information e l2, so as to produce the information l0S The encoded packets l0 'are applied to a transmitter block 522. The transmitters 522, 524 and 526 produce signals to be transmitted. The signals l0 ', and l2 are transmitted on the paths 528, 530 and 532 of the channel 0, channel 1 and channel 2, respectively to the receivers (RCVR) 534, 536 and 538, respectively. The receivers 536, 638 retrieve the information I, and l2, respectively. The receiver 534 retrieves the coded l0 'information. The information l0 \ \? The recovered l2 is applied to a packet alignment function illustrated as block 550, which aligns received information packets. The aligned information packages l0 ', l1 and l2 are applied to a decoding block 552, which extracts the information l0. The use of the invention makes it difficult for a "pirate" to capture a single bit stream from a single physical channel together with easily obtainable signals, such as input-output (IO) signals from a decoding "smart card", the engineer reverses the security measures. The invention makes this technique difficult since the bits from a group unknown (for the pirate) of physical channels, are transmitted simultaneously or in a temporary overlap, and must be received and stored for analysis in order to perform the processing . Even if the pirate could gain access to all physical channels, it is necessary to determine which of a large number (possibly 4.3 billion) of dependency groups applies to a given secured channel. When you do not have a dependency group, it is necessary to identify the dependency relation (the XOR arrangement in all the modalities). The difficulty that the pirate faces can be increased when the array 230 of the receiver (230 of Figure 2) is in the form of an integrated circuit or group of related integrated circuits, as many as the signals that will be useful so that a pirate scan does not appear in any IC terminal or IC groups, but that are "consumed" internally. The measure of this invention is based on a technological arrangement that is not commonly used, so presumably it is not well known. Consequently, the implementation of the method according to the invention will be achieved without many problems or in a "simple" way to avoid alerting the pirates. Multiple simultaneous physical channels can also be used to transmit on separate paths (a) the content and (b) key information for conventional encoding or encryption, so that access to multiple physical channels is necessary in order to try to extract the information relevant. Those skilled in the art know that the processing of multiple content channels to generate processed signals can be achieved in many ways, one of which is the described XOR processing. In general, the channel dependency can be entered as an N input, a function F of output logic 1 and removed with an input N, a function G of output logic I, where F and G are such that 10 = G (F (IO, 11, I2, ... ln), 11, ¡2, ... ln) is an identity. F = G for F = (lO XOR 1-1 (11, 12 .... I n), where H is an n-variable logical function.A XOR cascade is such a function .In the context of this invention, physical channels separated by frequency separation can be implemented in the context of electromagnetic transmissions (television or radio, for example) or by a separate packet time in time division multiplexing systems, or by separate orthogonal codes in the context of time division multiplexing A method of conforming to one aspect of the invention is to securely transmit a first information (l0) from a first location 508 to a second location 525, by means of a first channel 520, 522, 528, 534. The method comprises the steps of in the first 508 and second 525 locations, acquiring the second I-, and the additional information l2 that is independent of the first information, and aligning in time 516, 550 the second information and the additional information l2 in the first 508 and second locations 525. In the first location 508, the first information l0 is related to the second information l-and the additional information l2 by means of of a first function (F (I0,, l2) to thereby generate a transmission signal l0 'for transmission and the resulting signal l0' is transmitted from the first location 508 to the second location 525 by means of a first channel 528 of In the second location 525, the signal l0 'of the transmitter is related to the second information and with the additional information l2 with a second function (G (l0, l2)), that the inverse of the first function (F (l0) , li, l2)) to thus re retrieve the first information 10. In a particular mode of the method, the first and second functions are XOR functions. The step of acquiring the second information I-, and the additional information l2 at the second location 525 includes the steps of receiving the second information and the additional information l2 through channels 512, 524, 530, 536, 514, 526 , 532, 538 independent, individual signal. In a particularly advantageous version of this method, at least some of the second information ^ and of the additional information l2 is transmitted from the first location 508 to the second location 525. The step of transmitting at least some of the second information I -, and the second additional information l2 to the second location 525 can be realized by means of at least one channel 512, 524, 530, 536, 514, 526, 532, 538 of signal independent of the first channel 520, 522, 528 , 534 signal. The step of transmitting at least some of the second information and the additional information l2 to the second location 525 can be carried out by transmitting each of the second information I-, and the additional information l2 by means of a single channel signal independent of the first signal channel for each individual of the second information and of the additional information 512, 524, 530 and 536 for I ,, 514, 526, 532 and 538 for I2. In a particularly advantageous version of the method, the step of which in the second location 525, related to the signal l0 'of the transmission, the second information l-, and the additional information l2 with a second function (G (l0,, l2) ) is performed together with a receiver 230 with the ability to simultaneously receive multiple channels, including the first signal channel and the signal channels for each individual one of the second information and the additional information. A method according to an aspect of the invention is to securely transmit the first and second information from a first location 8 to a second location 224. The method comprises the step of processing the first information 1 by means of at least the second information N, so as to generate the first processed information 1 '. The second information N is processed by means of at least the first information 1 in order to generate the second processed information N '. The first 1 'and second N' processed information are transmitted separately by means of a first f1 and second fN independent physical channels, respectively, to the second location 224. In the second location 224, the first processed information 1 'is processed invested with the use of at least the second information N 'processed. The inverted processing of the second processed N 'information can be done with the use of at least the first information 1' processed. In a particular mode of the method, the step that in the second location 224 is processed in inverted the first information 1 'processed with the use of at least the second information N' processed, includes the step of independently receiving the first information 1 'processed from the first independent channel f1 and receiving, independently, the second information N' processed from the second independent channel fN. In a preferred mode of this method, this last step is carried out by an integrated circuit. In accordance with another aspect of the invention, a receiver 230 is provided to simultaneously retrieve at least the first information 1 received in form 1 'processed by means of a first independent physical channel f1 and the second information N by means of a second independent physical f2 channel. The first information 1 transmitted on the first physical channel f1 is processed before transmission together with the second information 2 to generate the encoded or processed 1 'information. The second information N 'is transmitted to the receiver 230 on a second independent fN channel. The receiver comprises means 240a for receiving the first information 1 'processed from the first physical channel f1, and also comprises means 240N for receiving the second information N from the second independent channel fN. A processing means 242 processes the first processed information 1 'together with the second information N to extract the first information 1 from the first processed information 1'. In the case where the information transmitted on the second channel fN is coded to form the second processed information N ', the processing means 242 also extracts the second information (content N) and for this purpose, the receiver 230 also comprises a processing means for processing the first information processed 1 'with the second information N' to extract information related to the shape of the second information N before processing with the first information 1. In a preferred embodiment of this receiver, all or most of the functions described are contained within a single integrated circuit.

Claims (24)

1. A method for securely transmitting first information from a first location to a second location by means of a first channel, the method is characterized in that it comprises the steps of: in the first and second locations, acquiring second information and additional information that is independent of the first information; align in time the second information and the additional information in the first and second locations; in the first location, to relate the first information with the second information and the additional information by means of a first function in order to generate a transmitting signal for its transmission; transmitting the transmit signal from the first location to the second location by means of a first signal channel; in the second location, relate the transmitting signal with the second information and the additional information with a second function that is the inverse of the first function, in order to recover the first information.

2. The method according to claim 1, characterized in that the first and second functions are XOR functions.

The method according to claim 1, characterized in that the step of acquiring the second information and the additional information in the second location includes the steps of receiving the second information and the additional information by means of individual, independent signal channels.

The method according to claim 1, characterized in that at least some of the second information and the additional information is transmitted from the first location to the second location.

The method according to claim 4, characterized in that the step of transmitting at least some of the second information and the additional information from the first location to the second location is performed by means of at least one independent signal channel of the first signal channel.

The method according to claim 4, characterized in that the step of transmitting at least some of the second information and the additional information from the first location to the second location is carried out by transmitting each of the second information and the additional information by means of a single signal channel independent of the first signal channel for each individual of the second information and additional information.

The method according to claim 6, characterized in that the passage of the second location, relating the transmit signal with the second information and the additional information with a second function is carried out together with a receiver with the ability to receive simultaneously multiple channels including the first signal channel and the signal channels for each individual of the second information and the additional information.

8. A method for securely transmitting the first and second information from a first location to a second location, the method is characterized in that it comprises: processing the first information by means of at least the second information in order to generate the first information processed; processing the second information by means of at least the first information in order to generate the second information processed; transmitting the first and second information processed separately by means of a first and second independent channels, respectively, to the second location; and in the second location, reverse the processing of the first processed information with the use of at least the second processed information and reverse the processing of the second processed information with the use of the at least the first processed information.

The method according to claim 8, characterized in that the step in the second location of reversing the processing of the first processed information with the use of at least the second processed information includes the step of independently receiving the first information. processed from the first independent channel and independently receive the second information processed from the second independent channel.

10. The method according to claim 8, characterized in that the step in the second location of reversing the processing of the first processed information and the second processed information includes the step of receiving the first processed information from the first independent channel and the second processed information from the second independent channel by means of an integrated circuit receiver arrangement.

11. A receiver for simultaneously retrieving at least one first information received in processed form by means of a first independent physical channel, wherein the first information transmitted on the first physical channel is processed together with the second information, and the second information is transmitted to a receiver on a second independent channel, the receiver is characterized in that it comprises: means for receiving the first information processed from the first physical channel; means for receiving the second information from the second independent channel; and a processing means for processing the first information processed together with the second information processed to extract the first information of the first processed information and the second information.

The receiver according to claim 11, characterized in that the second information transmitted on the second independent channel is processed before transmission by the processing with the first information, and wherein the receiver comprises: another processing means for processing the first information processed with the second information to extract information related to the form of the second information before processing with the first information.

The receiver according to claim 11, characterized in that the receiver is within a single integrated circuit.

14. The receiver according to claim 12, characterized in that the receiver is within a single integrated circuit.

15. A method for securely transmitting the first and second streams of information from a first location to a second location, the method is characterized in that it comprises: processing the first stream of information by means of at least the second stream of information for thus generate the first stream of processed information; processing the second stream of information by means of at least the first stream of information to thereby generate the second stream of information processed; transmitting the first and second information streams processed separately by means of first and second independent channels, respectively, to the second location; and in the second location, reverse the processing of the first stream of processed information with the use of at least the second stream of processed information and reverse the processing of the second stream of information processed with the use of the at least the first stream of information processed.

16. The method according to claim 15, characterized in that the step in the second location of reversing the processing of the first information stream processed with the use of at least the second stream of processed information includes the step of receiving in independently the first stream of information processed from the first independent channel and independently receive the second stream of information processed from the second independent channel.

The method according to claim 15, characterized in that the step in the second location of reversing the processing of the first information stream processed and the second information stream processed includes the step of receiving the first information stream processed from the first independent channel and the second information stream processed from the second independent channel by means of an integrated circuit receiver array.

18. The method according to claim 15, characterized in that it also comprises a third stream of information to be transmitted to the second location, characterized in that: the processing step of the first information stream by means of at least the second stream of information to generate a first stream of information processed includes the step of processing the first stream of information through a second and third stream of information; the step of processing the second stream of information by means of at least the first stream of information to thereby generate a second stream of processed information includes the step of processing the second stream of information by means of the first and third streams of information , and also includes the steps of: processing the third stream of information by means of at least the first and second streams of information to produce a third stream of processed information; transmitting the third information stream processed to the second location separately from the first and second information streams processed by means of a third independent channel of the first and second channels; and in the second location, reverse the processing of the third information stream with the use of at least the first and second streams of information processed.

The method according to claim 18, characterized in that the step in the second location of reversing the processing of the first processed information stream with the use of at least the second processed information stream and reversing the processing of the second one. stream of information processed with the use of at least the first stream of information processed, is performed by an inverted processing of the first information processed with the use of at least the second and third information processed, and by the inverted processing of the second information processed with the use of at least the first and third streams of information processed.

20. A receiver for recovering in form simultaneously recovering at least a first information stream received in processed form by means of a first independent physical channel, wherein the first information stream transmitted on the first physical channel is processed together with the second information stream, and the second information stream is transmitted to a receiver on a second independent channel, the receiver is characterized in that it comprises: means for receiving the first stream of information processed from the first physical channel; means for receiving the second stream of information from the second independent channel; and a processing means for processing the first information stream processed together with the second information stream processed to extract the first information stream from the first processed information and the second information stream.

The receiver according to claim 20, characterized in that the second information stream transmitted on the second independent channel is processed before transmission by the processing with the first information stream, and wherein the receiver comprises: another means of processing to process the first stream of information processed with the second stream of information to extract the information related to the shape of the second stream of information before processing with the first stream of information.

22. The receiver according to claim 20, characterized in that the receiver is within a single integrated circuit.

23. The receiver according to claim 21, characterized in that the receiver is within a single integrated circuit.

24. A method for transmitting a plurality of different streams of information from a first location to a second location, the method is characterized in that it comprises the steps of: in the first location, processing each of at least one plurality, greater than three , of information streams by means of at least one plurality, greater than three, of other information streams, in order to produce a plurality of information streams processed; transmitting the plurality of information streams processed by independent channels from the first location to the second location; in the second location, reverse the processing of each of the plurality of information streams processed by means of the other information streams processed, in order to recover at least some of the plurality of different information streams.