452 results about "Encrypted function" patented technology

An integrated circuit for data encryption/decryption and secure key management is disclosed. The integrated circuit may be used in conjunction with other integrated circuits, processors, and software to construct a wide variety of secure data processing, storage, and communication systems. A preferred embodiment of the integrated circuit includes a symmetric block cipher that may be scaled to strike a favorable balance among processing throughput and power consumption. The modular architecture also supports multiple encryption modes and key management functions such as one-way cryptographic hash and random number generator functions that leverage the scalable symmetric block cipher. The integrated circuit may also include a key management processor that can be programmed to support a wide variety of asymmetric key cryptography functions for secure key exchange with remote key storage devices and enterprise key management servers. Internal data and key buffers enable the device to re-key encrypted data without exposing data. The key management functions allow the device to function as a cryptographic domain bridge in a federated security architecture.

A system and method of recording data from a number of devices in a distributed network system in a manner adaptable for auditing the device output. The devices may include one or more control, sensor, edge, or peripheral computing devices physically separate in the distributed network system and in communication with a control server. Such distributed networks systems are common in SCADA or IoT applications. The content stream of data records output from the devices are recorded; a payload stripped stream of data records which are stripped of the payload are recorded and preferably retained by an escrow service. The metadata of the data records includes the hash value of one or more predecessor data records. The hash values are calculated based on the payload and a linkage function, preferably a cryptographic function. A comparison of hash values of the payload stripped stream and the content stream provides the audit ability.

One embodiment of the present invention provides a system for managing encryption within a database system that is managed by a database administrator, and wherein a user administrator not otherwise associated with the database system, manages users of the database system. This system performs encryption automatically and transparently to a user of the database system. The system operates by receiving a request to store data in a column of the database system. If a user has designated the column as an encrypted column, the system automatically encrypts the data using an encryption function. This encryption function uses a key stored in a keyfile managed by the security administrator. After encrypting the data, the system stores the data in the database system using a storage function of the database system.

A secure repository individualized for a hardware environment and a method and system for providing the same. The secure repository includes a hidden cryptographic key and code that applies the key without requiring access to a copy of the key. The code that implements the secure repository is generated in a manner that is at least partly based on a hardware ID associated with the hardware environment in which the secure repository is to be installed, and may also be based on a random number. Cryptographic functions implemented by the secure repository include decryption of encrypted information and validation of cryptographically signed information. The secure repository may be coupled to an application program, which uses cryptographic services provided by the secure repository, by way of a decoupling interface that provides a common communication and authentication interface for diverse types of secure repositories. The decoupling interface may take the form of a single application programmer interface (API) usable with multiple dynamically linkable libraries.

A cryptography system architecture provides cryptographic functionality to support an application requiring encryption. decryption, signing, and verification of electronic messages. The cryptography system has a cryptographic application program interface (CAPI) which interfaces with the application to receive requests for cryptographic functions. The cryptographic system further includes at least one cryptography service provider (CSP) that is independent from, but dynamically accessible by, the CAPI. The CSP provides the cryptographic functionality and manages the secret cryptographic keys. In particular, the CSP prevents exposure of the encryption keys in a non-encrypted form to the CAPI or application. The cryptographic system also has a private application program interface (PAPI) to provide direct access between the CSP and the user. The PAPI enables the user to confirm or reject certain requested cryptographic functions, such as digitally signing the messages or exportation of keys.

This patent application describes a data processing system and method for securely storing and retrieving a cryptographic secret from a plurality of network-enabled clients. The cryptographic secret is encrypted using a split key arrangement where a first key component is generated and stored inside a hardware security token and a second key component is generated and stored on a server. Random variables and dynamic passwords are introduced to mask the key components during transport. In order to gain access to the first password, the user is required to enter his or her PIN. The key encryption key is generated by performing a series of XOR operations, which unmasks the first and second key components on a client allowing generation of a symmetric key The symmetric key is used to encrypt the cryptographic secret at the user's normal client and decrypt the cryptogram at another client lacking the cryptographic secret. The applications performing the cryptographic functions are intended as browser applets, which remains in transient memory until the user's session has ended. At which time, the key encryption key and cryptographic secret are destroyed.

An isolated authentication device and related methods to provide a reliable means of authenticating the identity of its user to a network resource or server or other resource, and of authenticating the identity of a network resource or server or other resource to the device's user. The isolated authentication device may be attached to or in communication with a host device, such as a mobile telephone, personal digital or data assistant, GPS multifunction device, portable music player, wristband watch, personal computer, or similar device. A constrained operating system provides limited functionality, including authentication, data transfer, and cryptographic functions. Encrypted image, fingerprint, password, and/or personal identification number data is stored in read-only or protected nonvolatile memory. Input may be provided by means of a numeric or alphanumeric keypad, and images and information may be displayed on a screen. The device may be used to digitally sign a document, or a key to a lock.

In one exemplary embodiment of the invention, a method and computer program include: receiving first and second ciphertexts having first and second data encrypted per an encryption scheme, the encryption scheme has public/secret keys and encryption, decryption, operation and refresh functions, the encryption function encrypts data, the decryption decrypts ciphertext, the operation receives ciphertexts and performs operation(s) on them, the refresh operates to prevent growth of the magnitude of noise for a ciphertext while reducing the modulus of the ciphertext without using the secret key, utilizing a modulus switching technique that involves transforming a first ciphertext c modulo q into a second ciphertext c′ modulo p while preserving correctness, the technique includes scaling by p/q and rounding, p<q; using the operation function(s), performing operation(s) on them to obtain a third ciphertext; and reducing a noise level of the third ciphertext using the refresh function.

Malicious software is identified in an executable file by identifying malicious structural features, decryption code, and cryptographic functions. A malicious structural feature is identified by comparing a known malicious structural feature to one or more instructions of the executable file. A malicious structural feature is also identified by graphically and statistically comparing windows of bytes or instructions in a section of the executable file. Cryptography is an indicator of malicious software. Decryption code is identified in an executable file by identifying a tight loop around a reversible instruction that writes to random access memory. Cryptographic functions are identified in an executable file be obtaining a known cryptographic function and performing a string comparison of the numeric constants of the known cryptographic function with the executable file.

In one exemplary embodiment, a computer readable storage medium tangibly embodying a program of instructions executable by a machine for performing operations including: receiving information B to be encrypted as a ciphertext C in accordance with an encryption scheme having an encrypt function; and encrypting B in accordance with the encrypt function to obtain C, the scheme utilizes at least one public key A, where B, C, and A are matrices, the encrypt function receives as inputs A and B and outputs C as C→AS+pX+B (mod q), S is a random matrix, X is an error matrix, p is in integer, q is an odd prime number. In other exemplary embodiments, the encryption scheme includes a decrypt function that receives as inputs at least one private key T (a matrix) and C and outputs B as B=T⁻¹·(TCT^t mod q)·(T^t)⁻¹ mod p.

The present invention provides methods, systems, and computer program instructions for providing location-independent packet routing and secure access in a wireless networking environment (such as that encountered within a building), enabling client devices to travel seamlessly within the environment. Each client device uses a constant address. An address translation process that is transparent to the client and server is automatically performed as the device roams through the environment, enabling efficient client migration from one supporting access point to another. The secure access techniques provide user-centric authentication and allow policy-driven packet filtering, while taking advantage of encryption capabilities that are built in to the hardware at each endpoint.

A processor including general-purpose and cryptographic functionality, in which cryptographic operations are visible to user-specified software. According to one embodiment, a processor may include instruction execution logic configured to execute instructions specified by a user of the processor, where the instructions are compliant with a general-purpose instruction set architecture. The processor may further include a cryptographic functional unit configured to implement a plurality of cryptographic operations, and further configured to process the cryptographic operations independently of the instruction execution logic. A subset of the instructions may be executable to cause individual ones of the cryptographic operations to be processed by the cryptographic functional unit.

A DNS Proxy unit (A12a) holds the domain name of an encrypted communication target node in a CUG setting table (A125a), intercepts a name resolution request for a communication partner node output from an application (A11x) to a DNS server (B1a), determines by looking up the CUG setting table (A125a) whether the communication partner is an encrypted communication target node, and if the communication partner is an encrypted communication target node, registers the IP address of the name-resolved communication partner in an encrypted communication path setting table (A142a). A data packet sent from the application (A11x) to the IP address is intercepted by a data transmission/reception unit (A14a). A data packet to an IP address registered in the encrypted communication path setting table (A142a) is encrypted by a communication encryption unit (A141a) and transmitted to the communication partner. In this way, in executing encrypted communication with a plurality of communication partners by using a communication encryption function provided by an OS, setting of the encrypted communication target node can be done by using a domain name.

Proposed are a storage controller equipped with an encryption function, a data encryption method, and a storage system enabling a user to apply one's desired encryption policy to data received from a computer or the like. This storage controller includes a storage apparatus for storing data from a computer, and a controller for controlling the input and output of data stored in the storage apparatus. The controller has a configuration information management unit for managing configuration information of attributes concerning an encryption function as information for encrypting data, and an encryption execution unit for performing encryption of data from the computer and data stored in the storage apparatus based on the configuration information of attributes concerning the encryption function.

The method comprising, in a network based on a chain of individual Service Functions, SFs, that are composed to implement Network Services, NSs: assigning, at an ingress node of a network architecture, to at least one data packet received by said ingress node from the network, a unique cryptographic tag; processing said assigned unique cryptographic tag using a cryptographic function specific to each Service Function, SF; and verifying, at a given point of the network architecture, said processed unique cryptographic tag by applying a cryptographic verification function composed by the inverse functions of the cryptographic functions associated to the SFs traversed by the at least one data packet.

The storage control device of the present invention suppresses a drop in the performance of a host and storage control device by preventing the execution of encryption processing in the host and storage control device. The user presets an attribute that relates to the encryption of each storage device by considering the type of data transmitted from a higher order device (encryption data or plain data, for example) and the importance of the data and so forth. Such user operating policies are registered in a configuration management section via a setting section. When the data received from the higher-level device are encryption data, the storage control device stores the data in the storage device as is without performing encryption processing. When the received data are plain data, the storage control device converts the plain data into encryption data by performing encryption processing and stores the encryption data in the storage device.

This invention includes apparatus, systems, and methods to establish a virtual private network (“VPN”), or a secured network for authenticated and encrypted data transmission to prevent disclosure of private information to unauthorized parties. This invention provides secure and authenticated data transmission from a communication device to another device over any public or private network while using existing standard applications such as email, VoIP, internet browsers, ISR applications, video conferencing, telecommuting, inventory tracking and control, etc. without the need to secure or add encryption features into each specific application. This invention provides the opportunity to selectively secure one or more existing applications with configuration changes that can be made at the user-space level of the software stack and without need for higher level software stack access, such as root access.

A data storage device (such as a magnetic disk drive), which has a built-in encryption function using a self generated cipher key. The data storage device uses the cipher key to routinely encrypt the incoming data without instruction and/or control by the host system or other components that are external to the device and its dedicated controls (e.g., a disk drive controller card). The encryption function is a built-in function or self-contained function of the drive and/or it dedicated controller. To permanently delete the entire content of the drive, the cipher key is located and erased to render the ciphertext that is stored in the storage device unusable. In another embodiment of the present invention, the data disposal is managed on a file basis through the use of a plurality of internally generated file-specific cipher keys, which are managed through the aid of an internal key library.

A multimedia output device having embedded encryption functionality enables the outputting of content in an encrypted form. The multimedia output device receives the content to be encrypted, encrypts the content, and generates an electronic output of the encrypted content. The multimedia output device also generates an associated paper output that provides information about the decryption, such as a key, an identification of the electronic output of the encrypted content, and optionally a description of the contents of the content encrypted.

Embodiments of the present invention address deficiencies of the art in respect to encrypted message management in an archival environment, and provide a novel and non-obvious method, system and computer program product for message archival assurance. In one embodiment of the invention, a message archival assurance method can be provided that can include receiving an encrypted message designated for receipt by a messaging client; determining whether the encrypted message is decryptable using one of a set of a bulk keys accessible by the messaging system; and, archiving and forwarding the encrypted message to the messaging client only if the encrypted message is decryptable using one of a set of bulk keys accessible by the messaging system and otherwise discarding the encrypted message.

Techniques are disclosed for partitioning of cryptographic functionality, such as authentication code verification or generation ability, so as to permit delegation of at least one of a number of distinct portions of the cryptographic functionality from a delegating device to at least one recipient device. The cryptographic functionality is characterizable as a graph comprising a plurality of nodes, and a given set of the nodes is associated with a corresponding one of the distinct portions of the cryptographic functionality. Information representative of one or more of the nodes is transmitted from the delegating device to the recipient device such that the recipient device is thereby configurable for authorized execution of a corresponding one of the distinct portions of the cryptographic functionality. Advantageously, the invention provides a particularly efficient mechanism for the provision of cryptographic functionality in accordance with a subscription model.

The invention relates to an identity authentication system combining fingerprint identification and a PKI system in the technical field of information security, which comprises a certificate identity authentication subsystem, a fingerprint identity authentication subsystem, a service terminal and an intelligent password fingerprint instrument, wherein the certificate identity authentication subsystem, the fingerprint identity authentication subsystem and the service terminal are connected with one another through a network, the intelligent password fingerprint instrument is directly connected with the service terminal, and the certificate identity authentication subsystem is used for network identity authentications to ensure the data secure communications between each subsystems; and the fingerprint identity authentication subsystem consists of a fingerprint verification server which stores personnel fingerprints and identity information, supports the encryption function and simultaneously can transmit fingerprint templates to the certificate identity authentication subsystem, the service terminal and the intelligent password fingerprint instrument according to requests, and can verify the fingerprint templates and return information on matching or not matching according to the requests. The security strength of the identity authentication system is strengthened greatly.

A hierarchical key generation and distribution mechanism for a computer system in which devices are organized into secure enclaves. The mechanism enables network access to be tailored to approximate minimum needed privileges for each device. At the lowest level of the hierarchy, keys are used to form security associations between devices. Keys at each level of the hierarchy are generated from keys at a higher level of the hierarchy and key derivation information. Key derivation information is readily ascertainable, either from identifiers for devices or from within messages, supporting hardware offload of cryptographic functions. Because keys may be generated based on the enclaves in which the hosts participating in a security association are located, the system includes a mechanism by which devices can discover the enclave in which they are located.

A client queries a set of encrypted data instances located at a server with a query attribute of the client. The set of encrypted data instances is associated with a set of ciphertexts, wherein a ciphertext is an encrypted function of a representation of a corresponding data instance and a data instance attribute extracted from the corresponding data instance. The client decrypts the ciphertext from the set of ciphertexts based on a distance function of the query attribute and the data instance attribute to produce the representation, and accesses the corresponding data instance using the representation.