Ememory Technology Inc.

United Microelectronics Corp.

Pufsecurity Corporation

Meng-Yi Wu

Hsin-Ming Chen

Shyh-Fann Ting

Cheng-Tung Huang

Wen-Han Hung

Kun-Hsien Lee

Li-Shian Jeng

Ching-Sung Yang

Tzyy-Ming Cheng

Wei-Zhe Wong

Chih-Hao Huang

Po-Hao Huang

Chi-Yi Shao

Ching-Hsiang Hsu

Shih-Chieh Hsu

Chih-Chiang Wu

Fu-Yuan Chen

Kai-Hsin Chuang

Ching-Song Yang

Chia-Cho Wu

Lun-Chun Chen

Kung-Hong Lee

Hsin-Fen Chou

Yueh-Chia Wen

Yu-Ming Lin

Chih-Ming Wang

Ya-Chin King

Shu-Yen Chan

Tung-Cheng Kuo

Chia-Wen Liang

Tsai-Fu Hsiao

Chun-Hung Lu

Shih-Jung Tu

Ping-Lung Ho

Yao-Chin Cheng

Chih-Min Wang

Chin-Yi Chen

Yung-Hsiang Liu

Ya-Chin Kin

Jun-Heng You

Kuan-Ming Huang

Chung-Min Shih

An entropy source circuit, comprising: a first adjustable ring oscillator for operating under a first setting or a second setting according to a first control signal, for respectively generating a first oscillation clock signal and a second oscillation clock signal which have different frequencies under the first setting and the second setting; a first sampling circuit, for sampling the first oscillating clock signal according to the sampling frequency to generate first sampling values, or sampling the second oscillating clock signal according to the sampling frequency to generate second sampling values; a first detection circuit detecting a first distribution of the first sampling values; and a control circuit generating the first control signal to switch the first setting to the second setting when the first distribution does not meet a predetermined distribution. The entropy source circuit outputs entropy values according to the first sample value or the second sample value.

Entropy source circuit and entropy value generation method

An electronic device and a method for performing permission management of a storage device are provided. The storage device includes multiple storage blocks. The electronic device includes a controller and multiple dedicated interfaces, wherein the multiple dedicated interfaces are coupled to multiple ports of the controller. The controller is configured to perform access control of the storage device. The multiple dedicated interfaces correspond to the multiple storage blocks, and each dedicated interface of the multiple dedicated interfaces is configured to provide a dedicated channel for accessing one of the multiple storage blocks corresponding to said each dedicated interface via the controller.

Electronic device and method for performing permission management of storage device

A method of operating the physically unclonable function (PUF)-based key management system includes upon receiving a key generation request including a parameter, a load balancer dispatching a key generation request including a parameter from an external device according to workloads of a plurality of key management components (KMCs). A KMC having minimum workload among the plurality of KMCs is designated as the key-generation KMC and the key generation request is dispatched thereto, and remaining KMCs of the plurality of KMCs are designated as backup KMCs. The method further includes the key-generation KMC generating a key according to the parameter and a first PUF sequence, transmitting the key and an identifier associated therewith to the backup KMC via a backup channel, and the backup KMC generating a wrapped key according to the key and a second PUF sequence.

Key management system providing secure management of cryptographic keys, and methods of operating the same

A random number generator includes a static random number generator, a dynamic entropy source, a counter and a combining circuit. The static random number generator includes an initial random number pool and a static random number pool to output a static random number sequence from one thereof the initial random number pool and the static random number pool. The dynamic entropy source is used to generate a dynamic entropy bit. The counter is used to generate a dynamic random number sequence according to the dynamic entropy bit. The combining circuit is used to output a true random number sequence to a lively random number pool according to the static random number sequence and the dynamic random number sequence. The static random number pool is updated when the lively random number pool is fully updated.

Random number generator and method of generating output random number

A built-in self-test (BIST) circuit and a BIST method for Physical Unclonable Function (PUF) quality check are provided. The BIST circuit may include a PUF array, a readout circuit coupled to the PUF array, and a first comparing circuit coupled to the readout circuit. The PUF array may include a plurality of PUF units, wherein each of the PUF units includes a first cell and a second cell. The readout circuit may be configured to output an output bit from the first cell and output a parity bit from the second cell. The first comparing circuit may be configured to compare an output string with a parity string to generate a parity check result, wherein the output string includes output bits respectively read from selected PUF units of the PUF units, and the parity string includes parity bits read from the selected PUF units.

Built-in self-test circuit and built-in self-test method for physical unclonable function quality check

A method and a secure boot control circuit for controlling a secure boot of an electronic device. The method is applicable to the secure boot control circuit, and the electronic device includes the secure boot control circuit. The method includes: checking randomness of an output of an entropy source of the secure boot control circuit to generate a check result; utilizing the entropy source to provide a random number sequence; generating a reference code according to the random number sequence; comparing the reference code with an activation code stored in the secure boot control circuit to generate a comparison result; and determining whether to enable at least one function of the electronic device according to at least one of the check result and the comparison result.

Method and secure boot control circuit for controlling secure boot of electronic device and method for controlling enrollment of electronic device

An encryption key generating engine includes a random number pool, an entangling string generator, and a control circuit. The random number pool stores a plurality of random bits, and values of the plurality of random bits are generated randomly. The entangling string generator provides an entangling string according to an input key. The control circuit is coupled to the random number pool and the entangling string generator. The control circuit retrieves a sequence of random bits from the plurality of random bits stored in the random number pool according to the input key, receive the entangling string from the entangling string generator, and entangle the entangling string with the sequence of random bits to generate a secret key.

High speed encryption key generating engine

A random number generator includes a counting value generator, an address generator, a static entropy source and a processing circuit. The counting value generator generates a first random number. The address generator generates an address signal. The static entropy source is connected with the address generator to receive the address signal and generates a second random number. The processing circuit is connected with the static entropy source and the counting value generator to receive the first random number and the second random number. After the first random number and the second random number are processed by the processing circuit, the processing circuit generates an output random number.

Random number generator

A random code generator includes an address Y decoder, an address X decoder, a PUF entropy pool, a processing circuit and an entropy key storage circuit. The address Y decoder includes plural Y control lines. The address Y decoder selectively activates the plural Y control lines according to a first address Y signal. The address X decoder includes plural X control lines. The address X decoder selectively activates the plural X control lines according to a first address X signal. The PUF entropy pool generates an output data according to the activated Y control lines and the activated X control lines. When the random code generator is in a normal working state, the processing circuit processes the output data into a random code according to at least one entropy key from the entropy key storage circuit.

Random code generator

The communication system includes a communication buffer and a communication terminal. The communication buffer includes a physical unclonable function (PUF) device, and the communication buffer provides a security key generated by the PUF device. The communication terminal is coupled to the communication buffer, and transmits a mapping request to the communication buffer to ask for the security key. The communication terminal manipulates the transmission data with the security key to generate the encrypted data, and transmits the encrypted data to the communication buffer. The communication buffer further restores the transmission data from the encrypted data according to the security key.

Anti-counterfeit communication system

An entanglement and recall system includes an antifuse-type PUF cell array and a processing circuit. The antifuse-type PUF cell array generates at least one key. The processing circuit is connected with the antifuse-type PUF cell array to receive the at least one key. While an entanglement action is performed, the processing circuit receives a plain text and the at least one key and generates a cipher text according to the plain text and the at least one key. While a recall action is performed, the processing circuit receives the cipher text and the at least one key and generates the plain text according to the cipher text and the at least one key.

Entanglement and recall system using physically unclonable function technology

A security system includes a physical unclonable function circuit, a write-in protection circuit, a memory, and a readout decryption circuit. The physical unclonable function circuit provides a plurality of random bit strings. The write-in protection circuit receives a write-in address and original data, and includes an address scrambling unit. The address scrambling unit generates a scrambled address by scrambling a write-in address according to a random bit string provided by the physical unclonable function circuit. The memory stores the storage data corresponding to the original data according to the scrambled address. The readout decryption circuit reads out the storage data from the memory according to the write-in address to derive the original data.

Security system using random number bit string

A communication system includes a first communication system and a second communication terminal. The first communication terminal generates a first shared key, and the second communication terminal generates a second shared key. During an exchange operation, the first communication terminal stores the second shared key of the second communication terminal, and the second communication terminal stores the first shared key of the first communication terminal. During a challenge operation, the first communication terminal sends a challenge string to the second communication terminal, the second communication terminal generates a response string by performing reversible encryption operations to the challenge string with the first shared key and the second shared key, the second communication terminal sends the response string to the first communication terminal, and the first communication terminal verifies the response string.

Communication system capable of preserving a chip-to-chip integrity

A random code generator is installed in a semiconductor chip and includes a PUF cell array, a control circuit and a verification circuit. The PUF cell array includes m&#xd7;n PUF cells. The control circuit is connected with the PUF cell array. While a enroll action is performed, the control circuit enrolls the PUF cell array. The verification circuit is connected with the PUF cell array. While a verification action is performed, the verification circuit determines that p PUF cells of the PUF cell array are normal PUF cells and generates a corresponding a mapping information, wherein p is smaller than m&#xd7;n. While the semiconductor chip is enabled, the control circuit reads states of the p normal PUF cells of the PUF cell array according to the mapping information and generates a random code according to the states.

Random code generator and associated random code generating method

A security system with entropy bits includes a physically unclonable function circuit, and a security key generator. The physically unclonable function circuit provides a plurality of entropy bit strings. The security key generator generates a security key by manipulating a manipulation bit string derived from the plurality of entropy bit strings according to an operation entropy bit string. Each bit of the operation entropy bit string is used to determine whether to perform a corresponding operation to the manipulation bit string.

Security system with entropy bits

Growing community of inventors

Hsinchu County, Taiwan

Meng-Yi Wu