# US 2026/0087488 A1 · SECURITY NON-FUNGIBLE TOKENS (NFTs)

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- Number: US 2026/0087488 A1
- Document ID: US20260087488A1
- Status: Published application
- Kind: A1
- Application number: 18/893,539
- Filed: 2024-09-23
- Published: 2026-03-26
- Earliest claimed: 2024-09-23
- Assignees: American Express Travel Related Services Company, Inc.
- Applicants: American Express Travel Related Services Company, Inc.
- Inventors: John Thomas Hancock, III; Hiranmayi PALANKI
- Web page: https://patentgrep.com/patent/US20260087488A1

## CPC

- G06Q 20/363: {with the personal data of a user}
- G06Q 20/3672: {initialising or reloading thereof}
- G06Q 20/0655: {e-cash managed centrally}
- G06Q 20/3674: {involving authentication}
- G06Q 20/3825: {Use of electronic signatures}
- G06Q 20/3829: {involving key management}
- G06Q 20/389: {Keeping log of transactions for guaranteeing non-repudiation of a transaction}
- G06Q 20/4014: {Identity check for transactions}
- G06Q 20/405: {Establishing or using transaction specific rules}
- G06Q 2220/00: Business processing using cryptography
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR

## Abstract

Disclosed are various embodiments for creating security non-fungible tokens (NFTs) that provide security hardening to NFT wallets used to collect or store collectable NFTs. In response to a request to add a collectable NFT to a user wallet, security NFTs can be created. A security NFT can include a fraud NFT, an access NFT, and a customer service NFT. A fraud NFT is linked to the collectable NFT and can be used to detect fraud. An access NFT and a customer service NFT can be used to permit access to the user wallet.

## Claims

### Claim 1

A system, comprising:
a computing device comprising a processor and a memory; and
machine-readable instructions stored in the memory that, when executed by the processor, cause the computing device to at least:
receive a request to store a collectable non-fungible token (NFT) in a user wallet associated with a user;
mint a security NFT, the security NFT being minted to be associated with the collectable NFT, and the security NFT being stored in a security distributed ledger; and
store the collectable NFT in the user wallet.

### Claim 2 (depends on 1)

The system of claim 1, wherein the machine-readable instructions further cause the computing device to at least:
authenticate the user for access to the user wallet; and
mint a second security NFT to provide access to the user wallet in response to authenticating the user, the second security NFT being stored in the security distributed ledger.

### Claim 3 (depends on 1)

The system of claim 1, wherein the security NFT comprises a fraud NFT, and wherein generating the security NFT comprises
generating a fraud NFT smart contract; and
invoking a mint function of the fraud NFT smart contract.

### Claim 4 (depends on 3)

The system of claim 3, wherein the machine-readable instructions further cause the computing device to at least determine that the collectable NFT is compromised based at least in part on the fraud NFT.

### Claim 5 (depends on 4)

The system of claim 4, wherein the machine-readable instructions further cause the computing device to at least:
determine a similarity score based at least in part on a comparison of source code of the fraud NFT smart contract with source code of a plurality of compromised fraud NFT smart contracts; and
the collectible NFT being determined to be compromised when the similarity score fails to meet or exceed a predefined threshold value.

### Claim 6 (depends on 1)

The system of claim 1, wherein the request comprises a first request and the machine-readable instructions further cause the computing device to at least:
receive a second request from a customer service client device to access the user wallet associated with the user;
confirm that the customer service client device is permitted to access the user wallet; and
mint a customer service NFT to permit the customer service client device access to the user wallet, the customer service NFT being stored in the security distributed ledger.

### Claim 7 (depends on 6)

The system of claim 6, wherein the customer service NFT provides time-restricted access to the user wallet.

### Claim 8 (depends on 1)

The system of claim 1, wherein the machine-readable instructions further cause the computing device to at least verify an identity of the user.

### Claim 9 (depends on 8)

The system of claim 8, wherein verifying the user comprises sending a service request to a trusted third-party service to verify an identity of the user.

### Claim 10

A method, comprising:
receiving a request to verify a status of a collectable NFT;
obtaining source code associated with a security NFT smart contract associated with the collectable NFT;
generating a similarity score based at least in part on a comparison the source code associated with the security NFT smart contract with source code associated with a plurality of compromised security NFT smart contracts; and
determining that the collectable NFT is compromised based at least in part on the similarity score.

### Claim 11 (depends on 10)

The method of claim 10, wherein the security NFT smart contract is associated with a security NFT, and in response to determining that the collectable NFT is compromised, adding a security NFT identifier of the security NFT to a quantum database.

### Claim 12 (depends on 11)

The method of claim 11, wherein the security NFT comprises a collectable NFT identifier associated with the collectable NFT.

### Claim 13 (depends on 10)

The method of claim 10, further comprising converting the source code associated with the security NFT smart contract into a first abstract syntax tree, and comparing the first abstract syntax tree with a respective second abstract syntax tree associated with individual compromised security NFT smart contracts of the plurality of compromised security NFT smart contracts.

### Claim 14 (depends on 13)

The method of claim 13, wherein the similarity score is based at least in part on Grover's algorithm and Tree Edit Distance (TED).

### Claim 15

A non-transitory, computer-readable medium, comprising machine-readable instructions that, when executed by a processor of a computing device, cause the computing device to at least:
receive a request to store a collectable non-fungible token (NFT) in a user wallet associated with a user;
mint a first security NFT, the first security NFT being generated to be associated with the collectable NFT and comprising a wallet identifier associated with the user wallet;
mint a second security NFT, the second security NFT being generated to provide access to the user wallet comprising the wallet identifier associated with the user wallet; and
store the first security NFT and the second security NFT in a private security distributed ledger.

### Claim 16 (depends on 15)

The non-transitory, computer-readable medium of claim 15, wherein generating the first security NFT comprises:
generating a first security NFT smart contract; and
invoking a mint function of the first security NFT smart contract.

### Claim 17 (depends on 15)

The non-transitory, computer-readable medium of claim 15, wherein the first security NFT further comprises a collectable NFT identifier associated with the collectable NFT and a collectable NFT smart contract address associated with the collectable NFT.

### Claim 18 (depends on 15)

The non-transitory, computer-readable medium of claim 15, wherein the machine-readable instructions, when executed by the processor, further cause the computing device to at least verify an identity of the user, the first security NFT being generated in response to the identity of the user being identified.

### Claim 19 (depends on 15)

The non-transitory, computer-readable medium of claim 15, wherein the machine-readable instructions, when executed by the processor, further cause the computing device to at least authenticate the user for access to the user wallet, the second security NFT being minted in response to the user being authenticated.

### Claim 20 (depends on 15)

The non-transitory, computer-readable medium of claim 15, wherein the machine-readable instructions, when executed by the processor, further cause the computing device to at least store the collectable NFT in the user wallet.