Edward J Rodriguez

US Patent:

20200184111, Jun 11, 2020

Filed:

Feb 18, 2020

Appl. No.:

16/793022

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - Menlo Park CA, US

International Classification:

G06F 21/72
G06F 21/73
H04L 9/08
H04L 9/06
H04L 9/32
H04L 29/06
G06F 21/78
G06F 12/14
G06F 7/58
G06F 3/06

Abstract:

A cryptographic application-specific integrated circuit (ASIC) and method for autonomously storing context data into a one-time programmable memory in isolation are presented. The stored data describes product environmental history following manufacture, which may assist in assessing of a request for a refund or replacement of a defective product, such as an ASIC. The data may be cryptographically protected for retrieval and validation only by a manufacturer or authorized vendor. In another embodiment, communications between individual integrated circuits in a product may be secured by storing encryption keys as the context data, and exchanging the context data. The context data may be stored during manufacture, or thereafter. Such integrated circuits may be secured against replay attacks that capitalize on loss of context data that occurs when volatile memory is reset through power cycling, and enable inter-chip communications to be managed as are communications between unknown parties in an untrusted network.

US Patent:

20190342087, Nov 7, 2019

Filed:

Jul 16, 2019

Appl. No.:

16/512838

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - San Francisco CA, US

International Classification:

H04L 9/08
H04L 9/06

Abstract:

A cryptographic ASIC, method, and computer program product for creating, interacting with, and identifying an information stream via a derivative key hierarchy. A user with a programmed transform-enabled cryptographic circuit may process a predetermined input message to obtain a predetermined output message indicating an identity of a particular information stream, such as a blockchain. This user can also process other input messages, such as for verifying a blockchain, but cannot replicate the programmed transform-enabled cryptographic circuit without a transform key. At the medium level of the hierarchy, a user with the transform key can replicate the programmed transform-enabled cryptographic circuit, as well as process input messages and identify an information stream. However, only a user with knowledge of a user passphrase, from which the transform key may be derived during or after circuit manufacture, is capable of creating an information stream, such as a blockchain.

US Patent:

20190342099, Nov 7, 2019

Filed:

Jul 16, 2019

Appl. No.:

16/512901

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - San Francisco CA, US

International Classification:

H04L 9/32
H04L 9/08
G06F 21/72
H04L 9/06

Abstract:

A cryptographic ASIC and method for autonomously storing a unique internal identifier into a one-time programmable memory in isolation, by a foundry or a user. When later powered on, the ASIC calculates the value of the unique internal identifier from a predetermined input and compares the calculated identifier value to the stored identifier value. A match indicates the stored value is valid, while a mismatch indicates the stored value is invalid, whether due to natural memory component aging or damage by unauthorized access attempts. The ASIC may compare the calculated identifier to another copy or copies of the stored identifier, and disregard unreliable copies of the stored identifier. The ASIC may compare multiple copies of the stored identifier in a voting scheme to determine their validity. The confirmed valid lifetime of the ASIC thus extends far beyond the useful lifetime of a single copy of the stored identifier.

US Patent:

20190332552, Oct 31, 2019

Filed:

May 15, 2018

Appl. No.:

15/980179

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - San Francisco CA, US

International Classification:

G06F 12/14
G06F 3/06
G06F 21/78
H04L 29/06
G06F 7/58

Abstract:

A cryptographic ASIC and method for autonomously storing context data into a one-time programmable memory in isolation. In one embodiment, the stored data describes product environmental history following manufacture, which may assist in assessing of a request for a refund or replacement of a defective product, such as an ASIC. The stored data may be cryptographically protected for retrieval and validation only by a manufacturer or authorized vendor. In another embodiment, communications between individual integrated circuits in a product may be secured by storing encryption keys as the context data, and exchanging the context data. The context data may be stored during manufacture, or thereafter. Such integrated circuits may be secured against replay attacks that capitalize on loss of context data that occurs when volatile memory is reset through power cycling, and enable inter-chip communications to be managed as are communications between unknown parties in an untrusted network.

US Patent:

20190332817, Oct 31, 2019

Filed:

Mar 4, 2019

Appl. No.:

16/292142

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - San Francisco CA, US

International Classification:

G06F 21/72
H04L 9/08
H04L 9/32
H04L 9/06
G06F 21/73

Abstract:

A cryptographic ASIC and method for enforcing a derivative key hierarchy for managing an information stream. A programming user provides a user passphrase that is used to generate a transform key and is then deleted. The transform key is inaccessibly, invisibly, and indelibly generated and stored in a one-time programmable memory with externally generated programming pulses during or after manufacture, without being reported out to the user who provided the user passphrase. A transform-enabled cryptographic circuit or method customized with the transform key processes a predetermined input message to obtain a predetermined output message indicating an identity of a particular information stream. Other input messages may also be processed, such as for verifying a blockchain, but replication requires knowledge of the transform key. Only a programming user with knowledge of the user passphrase is capable of creating an information stream, such as a blockchain.

US Patent:

20190332818, Oct 31, 2019

Filed:

Mar 4, 2019

Appl. No.:

16/292162

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - San Francisco CA, US

International Classification:

G06F 21/72
H04L 9/08
H04L 9/32
H04L 9/06
G06F 21/73

Abstract:

A cryptographic ASIC and method for autonomously storing a unique internal identifier into a one-time programmable memory in isolation by a foundry. The identifier may be determined by calculating a transformed hash of a predetermined input, and may serve as a cryptographically defined and verifiable CpuID for a particular ASIC instance. The CpuID may be derived from an input based on a manufacture date, a wafer lot number, a wafer number, row and column coordinates for a die on a wafer, or other foundry-defined data. The CpuID enables a given ASIC instance to be securely and remotely identified across an untrusted network, and to serve as a specified processor that originates an information stream or a message. The ASIC need not always perform high-speed calculations and so may be relatively simple and inexpensive, and in one embodiment serves as a secure data administrator that manages subscriptions and software updates.

US Patent:

20190334711, Oct 31, 2019

Filed:

Nov 13, 2018

Appl. No.:

16/190073

Inventors:

- San Francisco CA, US
Edward L. Rodriguez De Castro - San Francisco CA, US

International Classification:

H04L 9/08
H04L 9/06
H04L 9/32

Abstract:

A cryptographic ASIC and method for autonomously storing data into a one-time programmable memory in isolation. Internal circuitry provides programming pulses of a given voltage magnitude and duration for changing the state of selected memory elements. Use of internal circuitry reduces pin count and increases reliability and security over devices relying on external circuitry to provide programming pulses. In one embodiment, the stored data comprises cryptographic data for enforcing a derivative key hierarchy for managing an information stream, such as a blockchain.