A transaction card with an embedded piezoelectric chip that senses a deliberate tap and generates an electrical pulse. Processing circuitry exchanges data with the terminal only when that pulse exceeds a threshold, so a card cannot be read without the holder's intent.
Mastercard · US 2021/0383358 A1 · Filed January 2020
Read the patentA reproducible, leakage-safe data platform for Nifty options research, built end to end with AI coding agents. Resumable, idempotent pipeline that ingested about 39.4 million minute-level option-chain bars (five years, weekly and monthly expiries) from the DhanHQ API, caching every raw response by request identity so multi-hour pulls resume where they stopped.
Python, DuckDB, Parquet, GARCH, LLM coding agents
See on GitHubA fault-tolerant MapReduce library over RPC, the Chandy-Lamport distributed snapshot on a token-passing system, and Raft leader election with a replicated key/value store.
Go
Priority scheduling with nested priority donation for locks, plus the multi-level feedback queue scheduler using fixed-point math over nice and recent-CPU values.
C
Benchmarked symmetric and asymmetric ciphers, then exploited a buffer overflow on a non-executable stack by chaining into libc's system().
Python, C