Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8135133 | Digital data file encryption apparatus and method According to an embodiment, the invention provides a method for decrypting content, the comprising: receiving the content without a source encryption key from a source device connected to the electric reproducing device, the content having been encrypted with the so... | 03/13/2012 |
| 8041036 | Method and apparatus for preventing the interception of data being transmitted to a web site by a monitoring program A method and apparatus for preventing the use of data involves creating a first association between a set of labels and a first set of codes, where the set of labels contains information to be displayed on a computer, while each code in the first set of codes is ass... | 10/18/2011 |
| 7995758 | Family of encryption keys Systems and techniques relating to cryptographic keys include, in one implementation, a technique involving: generating a symmetric encryption key; and generating from the symmetric encryption key a family of symmetric encryption keys having a relationship such that... | 08/09/2011 |
| 7945048 | Method, system and computer product for securing patient identity A method for securing patient identity comprising accessing an electronic medical records database including patient data for a plurality of patients. Each patient in the electronic medical records database is assigned a unique patient identifier. Patient data for a... | 05/17/2011 |
| 7773753 | Efficient remotely-keyed symmetric cryptography for digital rights management An efficient symmetrical-cryptographic method for using a fast but insecure host to perform encryption/decryption based on a secret key in a secure, but slow hardware token, such as a smartcard or similar device, without revealing the secret key to the host, and suc... | 08/10/2010 |
| 7769174 | Digital data file encryption apparatus and method The invention is directed to a digital data delivery system including a digital data server configured to deliver first key encrypted digital data to a source device, and the first key encrypted digital data is encrypted using a first key. The source device is confi... | 08/03/2010 |
| 7720227 | Encryption method for SIP message and encrypted SIP communication system It takes time for an encryption data communication system to transfer encrypted data, because negotiations of security parameters are necessary prior to communications in order to protect security and integrity of a SIP message or public key cryptography is required... | 05/18/2010 |
| 7702107 | Server-based encrypted messaging method and apparatus A method and system for server-based encrypted messaging that uses a receiver-determined password to symmetrically encrypt messages that are intended for that receiver. A sender authenticates to a Recipient Password Server in order to generate a message and optional... | 04/20/2010 |
| 7672455 | Method and apparatus for data encryption A method and apparatus for use in encrypting and decrypting digital communications converting an initial block to final block based on freely selectable control information and secret key information having double the length of prior art keys and maintaining compati... | 03/02/2010 |
| 7668313 | Recipient-encrypted session key cryptography A method for protecting secret keys, such as HDCP device key sets, during the manufacturing process is disclosed. In particular, the present invention comprises a method for securely sending and receiving data, such as HDCP device key sets, for use in a cryptosystem... | 02/23/2010 |
| 7657033 | Cryptography related to keys In one embodiment, messages are encrypted with encrypted transformations that commute with one another. In another embodiment, a message is divided into message segments, and with each encrypted message segment one or more encrypted keys are sent. The encrypted keys... | 02/02/2010 |
| 7646871 | Digital content encrypting apparatus and operating method thereof The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes performing an addition operation by using a first source internal key and an identifier (ID), the first so... | 01/12/2010 |
| 7643635 | Digital content decrypting apparatus and operating method thereof A device and method for decrypting re-encrypted digital contents are discussed. According to an embodiment, the method includes receiving the re-encrypted digital content without a source encryption key from a source device connected to the target device, wherein th... | 01/05/2010 |
| 7639811 | Digital content encrypting apparatus and operating method thereof The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes performing a first addition operation by using a first source internal key and an identifier (ID), the fir... | 12/29/2009 |
| 7639814 | Digital content decrypting apparatus and operating method thereof A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the ta... | 12/29/2009 |
| 7639813 | Digital content decrypting apparatus and operating method thereof A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the ta... | 12/29/2009 |
| 7639812 | Digital content encrypting apparatus and operating method thereof The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes receiving digital content from an external device, the digital content being encrypted using a first encry... | 12/29/2009 |
| 7639810 | Digital content encrypting apparatus and operating method thereof The invention is directed to a source device and a method for encrypting digital content at the source device. According to an embodiment, the method includes authenticating a target device connected to the source device using an identifier (ID) associated with at l... | 12/29/2009 |
| 7639815 | Digital content decrypting apparatus and operating method thereof A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the ta... | 12/29/2009 |
| 7606368 | Method and apparatus for data encryption A method and apparatus for use in encrypting and decrypting digital communications converting an initial block to final block based on freely selectable control information and secret key information having double the length of prior art keys and maintaining compati... | 10/20/2009 |
| 7602915 | Communication system having plurality of nodes sharing a common cipher key, cipher key dispatching apparatus for use in the system, and anti-theft apparatus utilizing information derived from cipher key utilization A communication system has a plurality of nodes that perform encrypted communication via a LAN, each using an identical common cipher key. The common cipher key is replaced at fixed or irregular intervals, by being transmitted from a main node in a broadcast mode vi... | 10/13/2009 |
| 7596222 | Encrypting data for access by multiple users A method for protecting data for access by a plurality of users. A server encrypts data using a master key and a symmetric encryption algorithm. For each authorized user, a key encryption key (KEK) is derived from a passphrase, and the master key is encrypted using ... | 09/29/2009 |
| 7496202 | Architecture for manufacturing authenticatable gaming systems An architecture is described to manufacture console-based gaming systems in a manner that allows them to be authenticated to a remote entity for online participation. The architecture involves placing pre-established secrets on the game console during console manufa... | 02/24/2009 |
| 7450720 | Linear transformation for symmetric-key ciphers A method of generating a linear transformation matrix A for use in a symmetric-key cipher includes generating a binary [n,k,d] error-correcting code, where k | 11/11/2008 |
| 7440570 | Method 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 |
| 7441116 | Secure resource distribution through encrypted pointers A secure pointer. The secure pointer can include an encrypted pointer to a resource disposed in a communicatively coupled computing device. The secure pointer also can include a network address of a server computing device able to locate the resource based upon a de... | 10/21/2008 |
| 7433473 | Data transmission method between a broadcasting center and a multimedia unit The aim of this invention is to propose a flexible solution to the risk represented by the interception of data by an unauthorized party during the transmission of said data between a broadcast center and a specialized decryption/decompression circuit such as is use... | 10/07/2008 |
| 7428638 | Architecture for manufacturing authenticatable gaming systems An architecture is described to manufacture console-based gaming systems in a manner that allows them to be authenticated to a remote entity. The architecture involves creating a console public key and a console private key for each console-based gaming system. A di... | 09/23/2008 |
| 7424116 | Method and apparatus for providing authentication in a communication system A method includes receiving an authentication request from a mobile station (401) and determining whether to forward the request to an authentication agent. When it is determined to forward the request, the request is forwarded to the authentication agent ( | 09/09/2008 |
| 7421741 | Securing digital content system and method A system and method of encrypting digital content in a digital container and securely locking the encrypted content to a particular user and/or computer or other computing device is provided. The system uses a token-based authentication and authorization procedure a... | 09/02/2008 |
| 7409552 | Method for securing communications between a terminal and an additional user equipment Method for securing a session over a radio or infrared wireless link (101) between a terminal (11) and a mobile equipment (10), said session being secured with a SIM card (100) in said mobile equipment (10). The terminal (11... | 08/05/2008 |
| 7403620 | Cyphering/decyphering performed by an integrated circuit A method of cyphering and/or decyphering, by an integrated circuit, of a digital input code by means of several keys, comprising: dividing the code into several data blocks of same dimensions; and applying to said blocks several turns of a cyphering or decyphering c... | 07/22/2008 |
| 7403622 | Process for managing a symmetric key in a communication network and devices for the implementation of this process A symmetric key management process in a communication network comprising a source device furnished with a source of data to be broadcast over the network and at least one receiver device intended to receive the broadcast data. The process comprises: determining and ... | 07/22/2008 |
| 7401356 | Method and system for e-mail message transmission An e-mail firewall applies policies to e-mail messages transmitted between a first site and a plurality of second sites. The e-mail firewall includes a plurality of mail transfer relay modules for transferring e-mail messages between the first site and one of the se... | 07/15/2008 |
| 7401223 | Authentication chip for authenticating an untrusted chip A trusted authentication chip for use in authenticating an untrusted authentication chip; the trusted authentication chip including a random number generator, a symmetric encryption function and two secret keys for the function, a signature function and a test funct... | 07/15/2008 |
| 7400730 | Cryptographic 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 |
| 7394900 | Method and apparatus for preventing the interception of data being transmitted to a web site by a monitoring program The present invention relates to a method and apparatus for preventing the use of data transmitted by a computer to a web site by a program operating on the computer. Initially, a first association between a set of labels and a first set of codes is created. The set... | 07/01/2008 |
| 7389413 | Method and system for filtering communication A e-mail relay provides message filtering services to an e-mail network. The e-mail relay monitors incoming communication and intercepts e-mail messages. The e-mail relay compares attributes of the messages to data derived from SPAM messages, which is stored in a SP... | 06/17/2008 |
| 7382880 | Method and apparatus for initializing multiple security modules A method and apparatus for initializing multiple security modules are provided. The method may comprise the acts of determining if the security module is a controlling security module or a subordinate security module, generating at least one key if the security modu... | 06/03/2008 |
| 7379546 | Method for XZ-elliptic curve cryptography Given a set of elliptic curve points defined over a field F(p) and represented in projective coordinate, a method is presented which allows the embedding of data bits in both the X-coordinate and the Z-coordinate of the elliptic curve point when represented in proje... | 05/27/2008 |
