Tootfinder

from my link log —
Setsum: order agnostic, additive, subtractive checksum.
https://avi.im/blag/2025/setsum/
saved 2025-09-14 https://dotat.at/:/SS4XB.h…

Agentic JWT: A Secure Delegation Protocol for Autonomous AI Agents
Abhishek Goswami
https://arxiv.org/abs/2509.13597 https://arxiv.org/pdf/2509.13597

Agentic JWT: A Secure Delegation Protocol for Autonomous AI Agents
Autonomous LLM agents can issue thousands of API calls per hour without human oversight. OAuth 2.0 assumes deterministic clients, but in agentic settings stochastic reasoning, prompt injection, or multi-agent orchestration can silently expand privileges. We introduce Agentic JWT (A-JWT), a dual-faceted intent token that binds each agent's action to verifiable user intent and, optionally, to a specific workflow step. A-JWT carries an agent's identity as a one-way checksum hash derived from its…

Did it turn out that the railway pass bought in KD ticket office doesn't work with the barcode scanners used in KW? Perhaps.
Did I immediately start scanning and analyzing the barcodes? Of course.
Well, KD tickets have two codes: a QR code with binary mash encoded in base64 (unnecessarily), which unfortunately I don't have time to analyze, and a code128 barcode with the ticket series and number, encoded as:
AA000000000 (0)
On the other hand, KW/PR have only code128 with the series and number, but without the digit in parentheses (perhaps a checksum?), even though it is printed on the pass:
AA000000000
#rail

apparently there is a special type of Flash (presumably) memory for pachinko machines that guarantees the checksum will not change over machine lifetime
presumably because of gambling regulations requiring these machines to be externally verifiable to have untampered with firmware!

from my link log —
Luhn credit card checksum using SWAR and SIMD.
https://nullprogram.com/blog/2022/04/30/
saved 2022-04-30 https://