US 11,876,889 B2Granted

NADO cryptography with key generators

AssigneeFiske Software LLC

InventorMichael Stephen Fiske

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Abstract

A symmetric cryptography for encrypting and decrypting information is provided, that can be implemented efficiently in hardware or in software. The symmetric cryptography uses a key generator, so that the cryptography is not dependent on a single, static cryptography key. The key generator is a value or collection of values from which the key is generated. In some embodiments, the key generator substantially increases the computational complexity of differential cryptanalysis and other cryptographic attacks because it has more entropy than the key(s). In an embodiment, the key generator is updated with one-way functions exhibiting the avalanche effect, which generates an unpredictable sequence of keys used during the encryption or decryption process. In an embodiment, a dynamic key is derived from a key generator with a one-way function. In an embodiment, a block cipher uses a different dynamic key to encrypt each block of plaintext, where each key is derived from a different key generator.

Claims11

Dependent claims

A machine implemented method of encrypting information, comprising:

providing, by a system, information and a first key generator. the system including at least one machine having at least one processor and at least one memory;
deriving a first key from the first key generator by applying a one-way hash function to both a first part and a second part of the first key generator,
wherein the size of the first key generator is at least 64 bits greater than the size of the first key;
encrypting, by the system, one or more blocks of the information based on the first key;
computing a second key generator by applying a one-way function to only the second part of the first key generator resulting in a second part of the second key generator, wherein said computing the second key generator keeps a first part of the second key generator the same as the first part of the first key generator;
deriving a second key from the second key generator by applying a one-way hash function to both the first part and the second part of the second key generator,
wherein the size of the second key generator is at least 64 bits greater than the size of the second key;
encrypting one or more additional blocks of the information based on the second key, and transmitting the encrypted blocks of information to a second machine.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/826,304Filed 23 Mar 2020 · continuation in part
Priority: 3 Sep 2015
Published: US 2020/0228315 A116 Jul 2020
Granted: 16 Jan 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 9/0631
Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation: substitution permutation…
H04L 9/0643
The encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions;…
H04L 9/0841
Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or…:…
H04L 9/0858
Quantum cryptography: details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding…