A method, device, system and kit for preventing the intelligible voice recording Is provided. The voice of a subject or Interlocutor Is recorded for a given time Interval thereby providing a voice recording. The voice recording Is cut Into shorter time interval segments thereby providing a set of voice recording segments. The set of voice recording segments is mixed in a randomly rearranged order, The mixed set of voice recording segments is spliced into a single randomly mixed voice recording. Emitting the randomly mixed voice recording during speaking of the subject or interlocutor prevents the Intelligible recording of the voice of the subject or interlocutor.

A securely pre-coded orthogonal frequency division multiplexing (SP-OFDM) system includes a transmitter configured to transmit a secure transmit signal through a dynamic constellation and a receiver configured to recover the original signal from the received secure transmit signal. It is aimed to reinforce the physical layer security of wireless communications under hostile interference. Potential applications include 4G and 5G communication systems, ASTC3.0 HDTV systems, WiFi systems, and any future wireless systems that utilize OFDM.

A memory system apparatus may be provided. The memory system may have memory controller. The memory controller may be configured to perform a scrambling operation before an error correction code (ECC) operation is performed.

A memory system apparatus may be provided. The memory system may have memory controller. The memory controller may be configured to perform a scrambling operation before an error correction code (ECC) operation is performed.

A method includes identifying, by an electronic device, one or more segments within a first audio recording that includes one or more non-speech segments and one or more speech segments. The method also includes generating, by the electronic device, one or more synthetic speech segments that include natural speech audio characteristics and that preserve one or more non-private features of the one or more speech segments. The method also includes generating, by the electronic device, an obfuscated audio recording by replacing the one or more speech segments with the one or more synthetic speech segments while maintaining the one or more non-speech segments, wherein the one or more synthetic speech segments prevent recognition of some content of the obfuscated audio recording.

A system and method for transmitting a digital signal comprising includes a random number generator for generating a pseudorandom code. A scheduler stores a plurality of signal sequences each matching a set of bandwidth-time products and center frequencies with a stored code. The scheduler selects a signal sequence by matching the pseudorandom code with one of the stored codes. The scheduler selects a bandwidth-time product and center frequency based on the selected signal sequence. A baseband processing unit generates the digital signal based on a selected bandwidth-time product and center frequency. A front end processing and beamforming unit broadcasts the digital signal.

The present disclosure relates to a communication method related with channel width agile. The method uses a channel generation circuit at a signal transmitting end to generate a channel whose channel width can be changed according to a certain law, and a channel detection circuit at a signal receiving end corresponding thereto to detect the corresponding channel width by the same channel width agile law, thereby achieving the secure reception of the signal. Due to the agility of the channel width, communication security is ensured, and it does not conflict with other technologies (such as frequency hopping), and the channel width can be dynamically allocated. In this way, the advantages of high security, compatibility, and high spectrum utilization can be achieved. Meanwhile, the method realizes the maximum possible optimization of the channel and is very creative.

An error correction apparatus may be provided. The error correction apparatus may be configured to perform a scrambling operation before an error correction code (ECC) operation is performed.

An error correction apparatus may be provided. The error correction apparatus may be configured to perform a scrambling operation before an error correction code (ECC) operation is performed.

Encoding element (100) at least selectively transparent to an infrared or ultraviolet light radiation, incident thereon on a first incidence surface (101), whereinin the volume defined by said encoding element (100)a plurality of areas (104) is provided, previously selected and arranged according to a predefined pattern wherein at least one polarisation characteristic of the optical radiation (200) that is incident thereon is varied, wherein the variation of said polarisation characteristic of said incident radiation is varied according to a localised alteration pattern biunivocally associated to a predefined ciphering key, and wherein said plurality of areas is arranged between said first incidence surface (101) on which said infrared or ultraviolet light radiation is incident in use, and a second output surface (102) of said infrared or ultraviolet light optical radiation.