Cryptographic ASIC for derivative key hierarchy
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.
1. A cryptographic system for managing operations on an information stream, the system comprising:
means for processing an input message from the information stream by:
hashing the input message into a hash using a first one-way function (OWF),
performing a customized transforming of the hash into a transformed hash, with the transforming customized based on a transform key derived from a user passphrase, and
hashing the transformed hash into a second hash as an output result using a second OWF; and
means for creating the information stream based on the transform key,
wherein the cryptographic system controls an information stream knowledge hierarchy and wherein knowledge of the transform key enables replication of the system.
2. The system of claim 1 , wherein the information stream is a blockchain.
3. The system of claim 1 , wherein the transforming comprises at least one of bit inversion and bit transposition.
4. The system of claim 1 , wherein the transform key is derived by processing the user passphrase through at least one OWF.
5. The system of claim 4 , wherein the transform key is derived from the user passphrase by a sequential application of at least two OWFs to the user passphrase.
6. The system of claim 1 , further comprising means for identifying the information stream using an identifier generated by processing a predetermined input message.
7. The system of claim 1 , wherein the transform key enables both the processing of the input message into the output result and an identification of the information stream.