127results about "Mechanically effected encryption" patented technology

A method of and a system for securely distributing data files to a user. A first key is encrypted using a second key. The encrypted first key is stored on an integrated circuit card that is associated with the user. The integrated circuit card is provided to the user. Data files are encrypted using the first key to get an encrypted data file at a first party. The encryption parameters are exchanged between the first party and integrated circuit card.

A method for secure communication between a first end terminal located in a first secure network and a second end terminal located in a second secure network, said first and second networks being separated by a relatively insecure intermediate network, wherein the method including the steps of: selectively routing a communication from the first end terminal to the second end terminal over said relatively insecure intermediate network by means of one or more network elements triggerable to selectively route said communication; and encrypting said selectively routed communication by means of an encryption engine before it traverses said intermediate network, wherein said one or more network elements and said encryption engine are located substantially within said firs secure network.

A user PC reads security information regarding itself, and acquires a profile including security information in a profile acquisition/output unit, the profile being created in an administrator's PC administering the setting of an access point. The security information included in the profile and the read information are compared with each other, and when both coincide, a setting of wireless communications is performed by a communication setting unit by use of the profile. Furthermore, status of a validity period and the like, when the wireless communications are set by use of the profile, are monitored by a status monitoring processing unit. When it is judged necessary to update the profile based on the monitored status, a profile including an update request is created by a data update processing unit, and the created profile is sent out to the administrator's PC.

An intelligent electronic device (“IED”) includes at least one function module that performs a specified function or feature. The function module operates to perform a power management function in conjunction with IED. The IED operates with a one key code corresponding to the power management function. The key code operates to enable or disable the power management function.

A header object for a data file is comprised of sub-objects which specify properties of the data stream and contains information needed to properly verify and interpret the information within the data object. In order to allow the protection of any set of sub-objects without requiring that the sub-objects follow any specific ordering, a new sub-object is introduced which includes region specifiers identifying regions within sub-objects and verification information for those regions. This new sub-object in the header object allows the modification of non-protected regions and reorganization of sub-objects in a header without invalidating verification information.

A method (and system) includes receiving a request to present information selected from a plurality of examples of information, reading an identification token of at least one user, and determining whether the at least one user is authorized to be presented the information.

A quantum cipher communication system includes a sender's apparatus, a recipient's apparatus and a transmission path. The sender's apparatus includes a beam splitting for splitting a laser beam into a weak signal light and an intense reference light, a phase modulation unit for imparting a phase change on either the weak signal light or the intense reference light. The recipient's apparatus includes a phase modulation unit for imparting a phase change on either the weak signal light or the intense reference light, a superimposing unit for superimposing the weak signal light and the intense reference light, a pair of photoconductive diodes for converting two output lights from the superimposing unit into electric signals, and an amplifying unit for amplifying a difference signal between the electric signals, wherein the recipient assigns bit values by comparing the difference signal with threshold values.

The invention relates notably to a method for performing a short-range wireless transaction between an hybrid wireless terminal and a service terminal. The hybrid terminal is able to communicate over a first interface with a radio communication network and over a second interface for short-range wireless access with a service terminal, the hybrid wireless terminal comprises a user authentication information for authenticating a user in the radio communication network. According to the invention, the method comprises the steps of: transmitting over the second interface for short-range wireless a message to the service terminal comprising at least the user authentication information; authenticating the user at the service terminal by checking the received user authentication information against an authentication database; enabling the transaction if the user authentication has been successful.

A key agreement method for secure communication in a multiple access system is provided. A key agreement method for secure communication in a multiple access system, the key agreement method includes the steps of (a) a first user, modulating signals from a source by a bit sequence and transmitting the modulated signal, (b) a second user, a legitimate counterpart of the first user, decoding, making decision for each bit of the signal with a detector affected by noise and recording the measured values, (c) the second user, deciding a threshold value of measurement with consideration of other factors such as a transmission rate, tolerable error rates, and a degree of security, (d) the second user adopting as a key string only bits having values beyond the threshold value and ignoring bits falling the erroneous region below the threshold, (e) the second user informing the first user that the n-th bit is adopted, not telling the value of the bit, and (f) the users, the first user and the second user, taking as a key string the values of the n-th bits adopted in (e), and discarding the values of the other bits.

Embodiments of the invention relate to methods of generating and using an image-based derived key. In various embodiments, the image-based derived key may be used to facilitate user authentication and data encryption. For some embodiments, a method is disclosed comprising determining an image-based derived key, wherein the image-based derived key is generated from a selection of authentication images chosen by a user, encrypting data using the image-based derived key, and transmitting the encrypted data.

A common key block encryption device includes a first hash unit applying locked key permutation to a variable-length s-bit plaintext, and outputting a fixed-length n-bit first block and a second (s-n)-bit block; a first encryption processing unit outputting a third block encrypted by element of n-bit block tweakable block cipher using tweak, inputting the first block; a second encryption processing unit generating a random number (s-n)-bit block with a result of group computation of the third block and the first block as input by using an arbitrary cipher having theoretical security at least against a known-plaintext attack; and a second hash unit applying the locked key permutation to the result of the group computation of the random number block and the second block, and to the third block to output a fifth n-bit block and a sixth (s-n)-bit block. The fifth and sixth blocks are concatenated into an s-bit encryption.

A microprocessor apparatus is provided, for performing a cryptographic operation. The microprocessor apparatus includes an x86-compatible microprocessor that has fetch logic, a cryptography unit, and an integer unit. The fetch logic is configured to fetch an application program from memory for execution by the x86-compatible microprocessor. The application program includes an atomic instruction that directs the x86-compatible microprocessor to perform the cryptographic operation. The atomic instruction has and opcode field and a repeat prefix field. The opcode field prescribes that the device accomplish the cryptographic operation as further specified within a control word stored in a memory. The repeat prefix field is coupled to the opcode field. The repeat prefix field indicates that the cryptographic operation prescribed by the atomic instruction is to be accomplished on a plurality of blocks of input data.

A method of encrypting and inputting data by creating a relationship between a predetermined indicator key and the data to be passed on is presented. In the preferred embodiment, one or more data encryption dials are presented, each with a compartmentalized ring containing numerical data values. At least one compartmentalized ring containing indicator keys is also positioned on the encryption dial which can be rotated into apposition with the numerical data values. When data values are entered, the interface uses the data value that is in apposition with the predetermined indicator key as the data value to be passed on to a data receiving system. Upon submission of the first data value, the positions of the indicator keys and numerical data values change randomly before allowing the user to use the encryption dials to submit the second data value.

The present invention relates to an information processing system and a method for use therewith, an information processing apparatus and a method for use therewith, and a program which are capable of decrypting desired portions of encrypted data. Of packets 211 through 216 constituting a bit stream of layered-encoded image data 201 according to JPEG 2000, the packets 211 through 213 are each encrypted independently of the packets 214 through 216 which are also encrypted each. This produces encrypted split data 262 with the resolution at level zero (corresponding to R0) and encrypted split data 263 with the resolution at level one (corresponding to R1). The header (ranging from SOC to SOD) of layered-encoded image data 201 is appropriated for a header 261, followed by encrypted split data 262 and 263 and an EOC 264, in that order, the whole data array constituting data 251 that is output as the definitive encrypted data. This invention is particularly applicable to image delivery apparatus.

A method and system for distributing a key is provided which make use of effects of noise caused at the time of transmitting or receiving a signal to send a key. A transmission signal is amplified at a plurality of stages while the relationship between the transmission signal and noise is being maintained at a level enough to satisfy predetermined criteria for security measures against eavesdropping activities, and the key is sent over a long distance. The aforementioned operation makes it possible to transmit or distribute a key over a long distance while maintaining the relationship between the transmission signal and noise at a level enough to satisfy the criteria for security measures against eavesdropping activities.