U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 6266829

Combination Beverage Container and Spittoon

A combination beverage container and spittoon includes a bottom portion including outer wall and a first inner wall defining a spittoon space.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 380/42 - Data stream/substitution enciphering


Subclass of Class 380 - Cryptography
Definition: Subject matter which encrypts a message signal composed
No. of patents: 363
Last issue date: 05/29/2012


1                    
NumberTitleIssue Date
8189776Method and system for encoding multimedia content based on secure coding schemes using stream cipher
Described herein are various embodiments of a coding technique that utilize a stream cipher for switching between first and second coding conventions for encoding a symbol sequence. The first coding convention specifies a first mapping between a symbol and a first c...
05/29/2012
8175267Communication apparatus, communication system, transmission method, and computer program product
A communication apparatus stores encrypted pieces having plural pieces as a part of a content encrypted, and number of transmission times. At least one first piece is encrypted by plural different encryption keys. The communication apparatus selects as priority piec...
05/08/2012
8155309Circuit arrangement with non-volatile memory module and method for en-/decrypting data in the non-volatile memory module
An apparatus and method is provided for protecting data in a non-volatile memory by using an encryption and decryption that encrypts and decrypts the address and the data stored in the non-volatile memory using a code read only memory that stores encryption and decr...
04/10/2012
8077868Mechanism for transport-safe codings for cryptographic use
In one embodiment, a mechanism for transport-safe codings for cryptographic use is disclosed. In one embodiment, a method for transport-safe coding for cryptographic use includes converting an input data stream into index values associated with “n” printable cha...
12/13/2011
8077867Confidential information processing apparatus, confidential information processing device, and confidential information processing method
The present invention relates to a confidential information processing device, a confidential information processing apparatus, and a confidential information processing method, and particularly to a confidential information processing device which performs multiple...
12/13/2011
7986781Method for controlling access to encrypted data
The invention concerns a method for controlling access to encrypted data (CT) by control words (CW), said control words being received by a security module in control messages (ECM) and returned to a unit operating on the encrypted data. Said control messages (ECM) ...
07/26/2011
7970132Reduced hierarchy key management system and method
A controller receives an encrypted media stream (“EMS”) and an identifier indicative of a selected content key from a headend. The EMS is encrypted with an encryption key and can be decrypted with a corresponding decryption key which is determinable from the sel...
06/28/2011
7936874Information transfer system, encryption device, and decryption device
A content delivery system, enabling a ciphertext to be reduced in size when using the ElGamal cipher, includes a content delivery device performing elliptic curve encryption on a content key, generating an encrypted content key that includes an x coordinate of an el...
05/03/2011
7933405Data access and permute unit
According to embodiments of the invention, there is disclosed a data processing unit, a method of operating the same, computer program product and an instruction. In one embodiment according to the invention, there is provided a data processing unit for a computer p...
04/26/2011
7925012Method and system for the secure distribution of compressed digital texts
A process for the secure distribution of compressed digital texts formed by blocks of binary data stemming from digital transformations applied to an original text, and including two stages: a preparatory stage including modifying at least one binary data in one of ...
04/12/2011
7860246System and method for protecting data in a secure system
A system for protecting data in a security system generates and encodes a backup key for encoding long-lived secrets. The system generates a distribution plan for distributing cryptographic splits of the encoded backup key to selected persons based on geographic and...
12/28/2010
7822198Parallel encryptor and decryptor
An encryptor/decryptor which receives a continuous parallel data stream either in a single-ended TTL or a Low Voltage Differential Signaling format. The encryptor/decryptor selectively encrypts or decrypts the incoming data stream, using an LVDS encryptor/decryptor ...
10/26/2010
7760874Method and system for implementing FI function in KASUMI algorithm for accelerating cryptography in GSM/GPRS/EDGE compliant handsets
In a wireless communication system, a method and system for implementing an FI function in a KASUMI algorithm for accelerating cryptography in GSM/GPRS/EDGE compliant handsets are provided. An efficient implementation of the FI function may comprise a first substitu...
07/20/2010
7747013Early detection system and method for encrypted signals within packet networks
A system and method for providing early detection of encrypted signals within a secure connection for voice over Internet protocol (VoIP). The system and method includes a non-complex, in-band, and early encryption detector within the voice path. A transmitter sends...
06/29/2010
7623656Stream cipher encryption and message authentication
Stream cipher encryption and message authentication. Stream cipher encryption is performed by generating a keystream at the transmitting end from a state value, applying the keystream to plaintext to generate an encrypted message block having at least a portion of t...
11/24/2009
7623657Methods and apparatus for secure and adaptive delivery of multimedia content
Techniques for securely and adaptively delivering multimedia content. It is assumed that a set of alternate access units for each time slot is obtained. Then, the encryption stream index of each access unit from the set of alternate access units of the previous time...
11/24/2009
7616762System and method for authenticating/registering network device in power line communication (PLC)
A method and apparatus for protecting privacy in power line communication (PLC) networks. Data transmitted on a PLC network is encrypted according to a network key and can be properly received only by registered devices that have the proper network ID and network ke...
11/10/2009
7606364Disk drive with flexible data stream encryption
A cipher engine performs cipher processing (encrypting/decrypting) on logical data streams in a physical data stream in a storage device. As the physical data stream changes from a first logical data stream to a second logical data stream, and the cipher engine swit...
10/20/2009
7602909Self-service terminal
A self-service terminal (10) is described. The terminal (10) includes a plurality of modules (14) arranged in a network (16) so that the modules are operable to communicate using the network (16). Each module (14) has storag...
10/13/2009
7580520Methods for scaling a progressively encrypted sequence of scalable data
A method for scaling a progressively encrypted sequence of scalable data is disclosed. The method includes associating data with the progressively encrypted sequence of scalable data that identifies combinable portions of the progressively encrypted sequence of scal...
08/25/2009
7551736Physical layer header scrambling in satellite broadcast systems
Methods and apparatuses for minimizing co-channel interference in communications systems are disclosed. A method in accordance with the present invention comprises scrambling a first header of the first signal using a first scrambling code, scrambling a second heade...
06/23/2009
7522724System and method of transmission of generalized scalable bit-streams
A method of encrypting a transmission unit of a generalized scalable bit-stream includes, encrypting a plurality of logic units of the transmission unit using a unique encryption key for each logic unit, where the unique encryption keys for the transmission unit for...
04/21/2009
7522725Method and apparatus for composable block re-encryption of publicly distributed content
Secure communication from one encryption domain to another using a trusted module. In one embodiment, the invention includes receiving encrypted streamed content encrypted with a first key, generating a substitution key stream based on the first key and a second key...
04/21/2009
7505588Stream cipher design with revolving buffers
Techniques are disclosed to limit short-term correlations associated with outputs of stream cipher keystream generators. Output values of a generator are paired such that the paired outputs are sufficiently far apart to be considered independent. In one described im...
03/17/2009
7505589Ternary and higher multi-value digital scramblers/descramblers
Ternary (3-value) and higher, multi-value digital scramblers/descramblers in digital communications. The method and apparatus of the present invention includes the creation of ternary (3-value) and higher value truth tables that establish ternary and higher value sc...
03/17/2009
7440570Method and apparatus for remote digital key generation
A method and apparatus that uses tha dynamics of chaotic system for the remote generation of a digital key, for use in any encryption algorithm. After initialization, the dynamics of a chaotic system are allowed to generate the 0 and 1 bits of a key bistream. An ini...
10/21/2008
7430292Methods and systems for securing information communicated between communication devices
A system is provided for generating information for secure transmission from a first device to a second device. The system comprising a key scheduler for generating a dynamic secret key, a synchronization generator for generating a synchronization sequence and contr...
09/30/2008
7428306Encryption apparatus and method for providing an encrypted file system
An encryption apparatus and method for providing an encrypted file system are provided. The encryption apparatus and method of the illustrative embodiments uses a combination of encryption methodologies so as to reduce the amount of decryption and re-encryption that...
09/23/2008
7426272Instrumentation privacy methods and apparatuses
The present invention provides methods and apparatuses for implementing communications privacy on a class of two-way wireless control communications. The methods and apparatuses of the present invention are cryptographic in nature and are built on a symmetric crypto...
09/16/2008
7424112Ciphertext switching for syntax compliant encryption
Systems and methods providing ciphertext switching for syntax compliant encryption are described. In one aspect, intermediate ciphertext is generated from syntax compliant plaintext. Post-processing is applied to the intermediate ciphertext to determine if there are...
09/09/2008
7421080Method of reconstructing a secret, shared secret reconstruction apparatus, and secret reconstruction system
Secret information is shared by a group of members by giving each member a first share of the information. To reconstruct the secret information, a subgroup consisting of some or all of the members generate second shares from their first shares, and distribute the s...
09/02/2008
7421076Advanced encryption standard (AES) engine with real time S-box generation
An advanced encryption standard (AES) engine with real time S-box generation includes a Galois field multiplier system in a first mode responsive to a first data block for generating an AES selection (S-box) function by executing the multiplicative increase in GF
09/02/2008
7418098Data type preserving encryption
A method and a system for encryption of a data element in a relational database, wherein each data element includes a string of at least one character. The method includes the steps of: reading the type of a data element which is to be encrypted; interpreting the da...
08/26/2008
7412605Method and apparatus for variable encryption of data
A system and method for encrypting content in an adaptive manner. Portions of data to be encrypted are identified and an encryption ratio that specifies the one or more portions of data to encrypt and other portions of data to not encrypt is determined. The data is ...
08/12/2008
7403615Methods and apparatus for accelerating ARC4 processing
Methods and apparatus are provided for improving ARC4 processing in a cryptography engine. A multiple ported memory can be used to allow pipelined read and write access to values in memory. Coherency checking can be applied to provide that read-after-write and write...
07/22/2008
7400730Cryptographic communication method in communication system
An RNC server issues an encryption start instruction to a media gateway (MG) and a terminal. The MG and terminal, which have received the encryption start instruction, encrypt U-Plane information using a predetermined secret key, and adds a predetermined encryption ...
07/15/2008
7386124Block encoding method and block encoding/decoding circuit
A block cipher method eliminates the overhead associated with key scheduling, decreases the required time for encryption or decryption, and increases the total throughput. A key scheduling circuit (12) for generating round key data from key data for the encry...
06/10/2008
7382876Hash function constructions from expander graphs
Hash function constructions from expander graphs are described. In one aspect, an expander graph is walked to compute a hash function. The expander graph is walked using respective subsets of an input message. A label of a last vertex walked is an output of the hash...
06/03/2008
7380132Data recording method and apparatus, data record medium and data reproducing method and apparatus
An input is ciphered in at least one of a sector forming circuit 13, a scrambling circuit 14, a header appendage circuit 15, an error correction encoding circuit 16, a modulation circuit 17 and a synchronization appendage circuit
05/27/2008
7376826Methods and apparatus for performing encryption and authentication
Methods and apparatus are provided for a cryptography accelerator to efficiently perform authentication and encryption operations. A data sequence is received at a cryptography accelerator. An encrypted authentication code and an encrypted data sequence is provided ...
05/20/2008
1                    
 
Sign InRegister
Username  
Password   
forgot password?