Using composite cipher technology building a single ciphertext C that will decrypt to the true (hot) plaintext P.sub.h using key K.sub.h, and to plaintext PjP.sub.h using key KjK.sub.h, thereby a single file C will carry any number of distinct plausible messages where an attacker cannot sort them out, but the intended reader who knows which key is K.sub.h will decrypt the ciphertext C to P.sub.h. Encryption and Decryption happens in a stand-alone, not Internet connected boxthe Innocence Box.

Systems and methods for generating min-increment counting bloom filters to determine count and frequency of device identifiers and attributes in a networking environment are disclosed. The system can maintain a set of data records including device identifiers and attributes associated with device in a network. The system can generate a vector comprising coordinates corresponding to counter registers. The system can identify hash functions to update a counting bloom filter. The system can hash the data records to extract index values pointing to a set of counter registers. The system can increment the positions in the min-increment counting bloom filter corresponding to the minimum values of the counter registers. The system can obtain an aggregated public key comprising a public key. The system can encrypt the counter registers using the aggregated shared key to generate an encrypted vector. The system can transmit the encrypted vector to a networked worker computing device.

A method for performing a power disturbing operation to reduce a success rate of cryptosystem power analysis attack, an associated cryptosystem processing circuit and an associated electronic device are provided. The method includes: generate at least one random number; generating a plurality of power disturbing parameters respectively corresponding to a plurality of bit calculation phases according to the at least one random number, where the plurality of bit calculation phases represent a plurality of cryptosystem processing phases related to a predetermined cryptosystem, and correspond to a plurality of private key bits of a private key, respectively; and according to the plurality of power disturbing parameters, enabling at least one predetermined circuit of a plurality of predetermined circuits in the plurality of bit calculation phases, respectively, to use power corresponding to the plurality of power disturbing parameters to perform the power disturbing operation in the plurality of bit calculation phases, respectively.

A system for secure communications using resonate cryptography includes a resonator that has a random number generator (RNG). The RNG can be at least one of a true random number generator, pseudo-random number generator, and any non-repeating sequence of numbers having a characteristic of a random number stream, and generating a first stream of random numbers. A transmitter, electrically coupled to the random number generator, is also included to transmit the generated first stream of random numbers.

A method for protecting a computer system from side-channel attacks when using an encryption or decryption method for data packets of a data stream, wherein interruptions in the encryption or decryption method are generated by a random generator, where further computing operations are applied during the interruptions to already encrypted or decrypted data packets of the data stream or to data packets of the data stream which are yet to be encrypted or decrypted to generate random noise in the power consumption of the computer system.

A logging device configured to store log messages, includes a storage device having a plurality of log entry locations which can be ordered as a sequence, an encryption device configured to generate the encrypted log messages from log messages, an authentication code generator configured to generate an authentication code from the encrypted log message, a key evolving device, a state storage device configured to store state variables for use by the encryption device, the authentication code generator and/or the key evolving device. Furthermore, a verification device configured to verify log entries stored in log entry locations of the storage device is also described. A method for storing log entries in log entry locations of a storage device of a logging device as well as to a method for verifying the integrity of log entries stored in log entry locations of a storage device is also described.

There is disclosed a method of authenticating a client computing device to a server, the client computing device and the server both parties to a common authentication approach, the client computing device including an encrypted identifier containing a secret, in which the client computing device cannot decrypt the encrypted identifier, in which the client computing device encrypts the encrypted identifier using the common authentication approach and sends the encrypted encrypted identifier to the server, and in which the server decrypts the encrypted encrypted identifier, using the common authentication approach and a server secret, so as to determine the secret. Related systems, servers, client computing devices, pairs of computer program products comprising a server program product and a client computing device program product, the server program product, or the client computing program product, are disclosed.

Devices for sampling a plurality of input signals are provided, wherein a sampling device is controlled to sample the input signals in a random order with additional delays. Other embodiments relate to voltage monitoring systems and corresponding methods.

An information processing apparatus determines whether a device accesses a box region of the information processing apparatus. When it is determined that the box region is accessed, a box ID entry screen is displayed on the device. The information processing apparatus determines whether a box ID is entered by a user of the device. If it is determined that a box ID is entered, then device information about the device is obtained. After the device information is obtained, the information processing apparatus determines whether the device possesses a hardware keyboard. If it is determined that the device possesses a hardware keyboard, a password authentication screen is displayed on the device. If it is determined that the device does not possess a hardware keyboard, an image authentication screen is displayed on the device.

Encryption and decryption techniques based on one or more transposition vectors. A secret key is used to generate vectors that describe permutation (or repositioning) of characters within a segment length equal to a length of the transposition vector. The transposition vector is then inherited by the encryption process, which shifts characters and encrypts those characters using a variety of encryption processes, all completely reversible. In one embodiment, one or more auxiliary keys, transmitted as clear text header values, are used as initial values to vary the transposition vectors generated from the secret key, e.g., from encryption-to-encryption. Any number of rounds of encryption can be applied, each having associated headers used to detokenize encryption data and perform rounds to decryption to recover the original data (or parent token information). Format preserving encryption (FPE) techniques are also provided with application to, e.g., payment processing.