Projects

Lightweight TCP/IP stack for the TI-84+ CE with an integrated Ethernet driver derived from lwIP by nonGNU. Contains a TLS 1.3 implementation and a custom lightweight trust store.

• lwIP-CE provides a full internet connection over USB to a device that doesn't natively provide it with no hardware modification.
• Includes a compact TLS 1.3 stack, using the same modern encryption that drives the padlock icon in the browser. The stack includes a statistically validated RNG built from electrical noise in calculator memory, plus core cryptographic primitives such as AES-128-GCM, SHA-256, HKDF/HMAC, X25519 ECDHE, and RSA-2048 signature verification for certificate validation.
• Tested like professional security software. Every non-upstream addition has test coverage, every cryptographic primitive is validated against NIST-published CAVP test vectors, a timing analysis suite, and static analysis scans every line of code added to the project.

A full-function cryptographic library for the TI-84+ CE allowing developers to implement NIST standards for encryption into their programs.

• Implements well-established, publicly specified cryptographic standards — AES, RSA, SHA-256, HMAC, PBKDF2, and elliptic curve primitives. No self-rolled crypto; everything traces back to NIST and RFC specifications.
• Brought modern cryptography to a platform that had none. Before CryptX, the TI-84+ CE had no serious cryptographic library. Developers who needed encryption had no viable option. CryptX changed that.
• The starting point of a longer journey. CryptX predates the formal testing and validation pipeline that lwIP-CE introduced. It was where the hard lessons about cryptographic rigor were learned — lessons that directly shaped the stricter engineering standards applied to lwIP-CE's TLS implementation.

A Discord client for the TI-84+ CE calculator, enabling real-time messaging over the Discord API via lwIP-CE.

• Implements the Discord Gateway API over WebSocket, enabling real-time messaging on a graphing calculator
• Built on lwIP-CE. Requires an active Ethernet/USB connection and TLS 1.3
• Uses an OIDC provider to manage identity calculator side, and slash-commands/account linking to allow a bot to interact with a server on a user's behalf.

Utility that validates hashes of programs, appvars and the operating system of the TI-84+ CE. Also checks the aforementioned for malware based on community-sourced malware definitions.

• Uses SHA-256 hashing and maintains an AIDE-style database of known good hashes for programs and appvars.
• Accepts a community-sourced curated virus definitions file and scans executables for signatures from the definitions file.
• Prone to false positives due to inability to distinguish executable sections from benign data.