Abstract: A method of testing an integrated circuit. The method includes selecting a set of physical features of nets and devices of the integrated circuit, the integrated circuit having pattern input points and pattern observation points connected by the nets, each of the nets defined by an input point and all fan out paths to (i) input points of other nets of the nets or (ii) to the pattern observation points; selecting a measurement unit for each feature of the set of features; assigning a weight to each segment of each fan out path based on a number of the measurement units of the feature in each segment of each fan out path of each of the nets; and generating a set of test patterns optimized for test-coverage and cost based on the weights assigned to each segment of each of the nets of the integrated circuit.

Abstract: A method of testing an integrated circuit. The method includes selecting a set of physical features of nets and devices of the integrated circuit, the integrated circuit having pattern input points and pattern observation points connected by the nets, each of the nets defined by an input point and all fan out paths to (i) input points of other nets of the nets or (ii) to the pattern observation points; selecting a measurement unit for each feature of the set of features; assigning a weight to each segment of each fan out path based on a number of the measurement units of the feature in each segment of each fan out path of each of the nets; and generating a set of test patterns optimized for test-coverage and cost based on the weights assigned to each segment of each of the nets of the integrated circuit.

Abstract: A method for controlling access to data contained within a radio frequency identification (RFID) tag associated with an item includes reading the RFID tag; receiving a first value from a personal communication device associated with a purchaser of the item; creating a key using the first value received from the personal communication device and a second value associated with the item; and initially transmitting the key to both the RFID tag and the personal communication device. The RFID tag is configured to automatically program one or more electrically programmable fuse devices therein so as to prevent subsequent reading of data therein by an RFID reading device, upon receipt of a valid key initially transmitted thereto. The RFID tag is further configured to automatically program one or more additional fuse devices therein so as to restore read access to the data therein, upon receipt of a valid key subsequently transmitted thereto.

Abstract: A structural design-for-test for diagnosing broken scan chain defects of long non-scannable register chains (GPTR) The GPTR and the system for testing and diagnosing the broken LSSD scan-only chains rapidly localize defects to the failing Shift Register Latch (SRL) pair. The GPTR modifies the latches used in the GPTR scan chain to standard LSSD L1/L2 master-slave SRL type latch pairs; connects all the system ports of the L1 latches to the Shift Register Input (SRI) and clocked by the system C1-clk while the L1 scan port is clocked by the A-clk and L2 scan port is clocked only by the B-clk. The L1 latches are connected to at least one multiplexer having a first output connected to an input of each odd SRL, and a second output connected to an input port of each even SRL.

Abstract: A computer random access memory is divided into first and second partitions. Each partition has its own operating system (OS). The first partition has a conventional OS and is designated for non-Internet use. The second partition is designated for secure Internet access, and has an OS specific for Internet usage. Software in the second partition cannot write or copy files in the second partition. The size of the second partition is fixed and unchangeable while said second partition is open. Each software application in the second partition is allocated a memory region that cannot be changed, thereby preventing memory overflow attacks. A secure memory is designated for temporary storage of software used in the second partition. Cyclic redundancy check (CRC) values are calculated for all files in the secure memory. To detect unauthorized file changes, CRC values are calculated for all files used in the second partition, and checked against values stored in the secure memory.

Abstract: A secure card adapter provides for writing of highly secure, single transaction information on a machine-readable medium of a card structure in accordance with a format that may be downloaded from an external data source. The card structure may be, for example, an existing access authorization card or an existing credit card containing account-specific information which can be read and stored in memory of the secure card adapter. Once such account-specific information is read from an existing access authorization or credit card, secure transaction information can be written, together with the account specific information in accordance with the downloaded format information on another card structure to provide a universal access authorization and/or credit card. Thus the secure card adapter provides an enhanced degree of security through an existing or transitional communication infrastructure.

Abstract: A diagnostic process applicable to VLSI designs to address the accuracy of diagnostic resolution. Environmentally based fail data drives adaptive test methods which hone the test pattern set and fail data collection for successful diagnostic resolution. Environmentally based fail data is used in diagnostic simulation to achieve a more accurate environmentally based fault callout. When needed, additional information is included in the process to further refine and define the simulation or callout result. Similarly, as needed adaptive test pattern generation methods are employed to result in enhanced diagnostic resolution.

Abstract: A method and system for allowing the purchaser of an on-demand entertainment session of predetermined time duration to reaccess that portion of the session not used. On-demand passenger entertainment services in airline flights often offer services, such as movies, of a predetermined time duration which time is longer than the time of flight. The method and system disclosed allows purchasers to gain access on another flight to the unused portion of the services, such as, the unseen portion of a movie, terminated at the end of the initial flight.

Abstract: A method (and structure) of at least one of testing, diagnosing, and monitoring an operation of an electronic circuit, includes interrupting a clock signal used to provide a clocking for a normal operation of the circuit and using a second clock signal to repeatedly cycle through a predetermined cycle of operations for the circuit.

Abstract: Methods for testing a semiconductor circuit (10) including testing the circuit and modifying a well bias (14, 18) of the circuit during testing. The methods improve the resolution of voltage-based and IDDQ testing and diagnosis by modifying well bias during testing. In addition, the methods provide more efficient stresses during stress testing. The methods apply to ICs where the semiconductor well (wells and/or substrates) are wired separately from the chip VDD and GND, allowing for external control (40) of the well potentials during test. In general, the methods rely on using the well bias to change transistor threshold voltages.

Abstract: Systems, methods and apparatus are provided for isolating a defect in a scan chain. The invention includes modifying a first test mode of a plurality of latches included in a scan chain, operating the latches in the modified first test mode, and operating the plurality of latches included in the scan chain in a second test mode. A portion of the scan chain adjacent and following a stuck-@-0 or stuck-@-1 fault in the scan chain may store and/or output a value complementary to the value on the output of the previous portion of the scan chain due to the fault. Such values may be unloaded from the scan chain and used for diagnosing (e.g., isolating a defect in) the defective scan chain. Numerous other aspects are provided.

Abstract: A method of authentication includes the steps of providing a transaction service provider having a secure server; providing a user; requesting access authorization to the server of the service provider by the user, the server storing a set of use parameters obtained from the authorization access request, the use parameters including at least several prior location coordinates, methods of access, transaction information and access hardware used during the authentication to be used by the transaction service provider in subsequent requests by the user to access the server, the use parameters used in the authentication to be continually updated with the most recent data.

Abstract: A password protected machine where a primary alternative password and a secondary alternative password are assigned, but the secondary alternative password cannot be used to gain access unless and until the primary alternative password has been deactivated. Also, a password protected machine where a user is assigned at least two alternative passwords, and where the use of one alternative password will automatically deactivate the other password. Preferably, there is a primary password and a secondary password such that: (i) the use of the primary password does not deactivate the secondary password, but (ii) the use of the secondary password does deactivate the primary password.

Abstract: A user-authenticating, digital data recording pen is provided. User-authenticating includes: using the digital data recording pen to write out by a user a handwritten password, which includes a handwritten character string to be authenticated; digitally comparing by the digital data recording pen the handwritten password to at least one handwritten password pre-stored for the user in the digital data recording pen; authenticating by the digital data recording pen the user if the handwritten password is within a defined tolerance of the pre-stored handwritten password; and if authenticated, associating by the digital data recording pen an indication of user authentication with data, such as a writing, of the user produced using the digital data recording pen. In one embodiment, the writing could be any alpha-numerical character string of the user interacting with a system via the digital data recording pen.

Abstract: An authentication method and system. A computing system generates an authentication table associated with a user. The computing system receives first authentication data and second authentication data differing from the first authentication data. The first authentication data and the second authentication data are placed in the authentication table. The authentication table comprising the first authentication data and the second authentication data is stored in the computing system. The computing system generates an action table. The computing system receives first action data and second action data and places the first action data and the second action data in the action table. The action table comprising the first action data and the second action data is stored in the computing system.

Abstract: A method for user information authentication which includes setting user information for a user account, such user information being the set user information; inputting user information by a user for the user account into a device, such user information being the input user information; evaluating the input user information for correspondence with the set user information according to fault-tolerant user information rules, wherein such rules evaluate the input user information for content and closeness to the set user information and noting if the input user information is a valid user information, a fault-tolerant user information, or an invalid user information; authorizing access to the user account if the input user information is a valid user information. In one embodiment of the invention, the method includes incrementing an invalid user information counter only if the user information is an invalid user information.

Abstract: A rules driven multiple passwords system is provided wherein a list of stored passwords are used in rotation over time in accordance with a set of rules or conditions managed by the system. With such an arrangement, the currently active password of a system User may automatically be changed, in accordance with the rules or conditions, to the next password in the list. The User is notified as to the newly assigned password.

Abstract: A password, unknown to a user to be authenticated by the password, is created by comparing an image provided by the user to a master image. Random differences between the images are found and used to create the password. The password is then validated to determine whether the user is authorized and/or to determine whether a communication provided by the user is to be processed.

Abstract: An enhanced security method is provided for accessing information from a second computer using a password at a first computer. According to such method, a password used for accessing information is inputted to the first computer and stored on the first computer. Thereafter, the stored password is encoded using an encoding algorithm which is system specific to the first computer, and the encoded password is then transmitted to the second computer. The encoded password is used at the second computer to grant or deny access to the requested information, without the second computer having to decode the encoded password to obtain the password stored on the first computer.

Abstract: A remote control instant messaging method and system for automatically activating an instant messaging session based upon remote detection of a user approaching a processor capable of executing an instant message system. The method and system also automatically deactivate the instant messaging session based upon remote detection of the user's absence from such processor and automatically re-activate the instant messaging session based upon remote detection of the user's return to the processor. A second instant messaging session can also be remotely activated on a second processor operated by another user_id by detecting the first user's approach to such second processor. The first user is automatically disengaged from this second instant messaging session when the user leaves the location of the second processor.