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b2b-edi

EDI and e-invoicing networks

IBM Sterling, SPS Commerce, OpenText Trading Grid

SystemTechniques · 15Primitives · 64 b2b-edi Deterministic simulation testingdistributed · medium: Run the whole system in one thread under a seeded scheduler with simulated network, disk and clock, so every failure replays from its seed.›Durable job queuedistributed · medium: Persisted tasks that workers lease for a visibility timeout, ack on success and retry with backoff; at-least-once execution that survives worker and queue crashes.›Primary-backup replicationdistributed · medium: One node orders all writes and ships them to standbys; the acknowledgement rule (none, one, all) sets what a crash loses, and an external arbiter decides who takes over.›Webhook deliverynetworking · medium: Reliable server-to-server HTTP callbacks: signed POSTs, 2xx-means-done, retries over days with jitter, endpoint disabling, SSRF guards and idempotent receivers.›Certificate revocationsecurity · medium: CRLs, OCSP, OCSP stapling, short-lived certificates and CRLite-style filters for revoked certificatesCoverage-guided fuzzingsecurity · medium: Mutate inputs, run an instrumented target, and keep any input that reaches a new code edge; feedback turns blind guessing into incremental search.›Envelope encryptionsecurity · medium: Encrypt each object with its own data key and wrap that key under a KMS-held key, so rotation re-wraps 60 bytes and deleting a key shreds data.›Exponential backoff with jittersystems · low: Retry after delays that grow geometrically and are randomized, so failed clients spread out instead of hammering a recovering service in synchronized waves.›ECDSA signaturessecurity · low: The elliptic-curve signature standardised in FIPS 186-5 (P-256) and used by secp256k1 ledgers; 64-byte signatures, but a repeated or biased nonce leaks the private key.›X509 certificatessecurity · low: Certificate chains, path validation, SANs, revocation and short-lived issuanceTrusted timestampingsecurity · low: RFC 3161 time-stamp tokens: a TSA signs a hash with time, proving data existed thenCryptographic hashes (SHA-2, BLAKE3)security · low: Collision-resistant fingerprints of data; SHA-256 for interoperability, BLAKE3 for speed, HMAC/HKDF for keyed uses.›Hdr histogramdata-structures · low: Log-linear bucketed histograms with bounded relative error for latency percentilesEvent deduplication windowdistributed · low: Keep the ids of recently accepted events for a time window and drop repeats; memory stays bounded by rotating time buckets instead of per-entry timers.›Money representationfinance · low: Store money as integer minor units with an explicit currency exponent, compute in wider integers, and round once with a named rounding mode.›Process supervisionhardware-os · low: A parent process starts services, reaps their exits and restarts them under a delay and burst-limit policy, then stops them with SIGTERM before SIGKILL.›DNS message format and client looku…networking · low: Binary query/response format of DNS (RFC 1035) and how a stub client uses it: record types, name compression, UDP/TCP/EDNS sizes, TTL caching.›HTTP/1.1 message parsingnetworking · low: Parse HTTP/1.1 requests and responses incrementally from a byte stream: RFC 9112 body-length rules, chunked decoding and the strictness that stops request smuggling.›X12 edi messagingnetworking · low: ANSI X12 and EDIFACT interchanges: segment/element delimiters, ISA/GS/ST envelopes, control numbers and 997/CONTRL acknowledgementsMutual TLSsecurity · low: TLS where the client also proves a certificate key, so every connection carries a verified, rotatable machine identity.›Rsa cryptosystemsecurity · low: RSA key generation, OAEP encryption and PSS/PKCS#1 v1.5 signatures, key sizes and padding pitfallsSSH protocol (transport, auth, chan…security · low: A three-layer protocol on one TCP connection: encrypted packet transport, user authentication, then multiplexed channels with windows for shells, files and port forwards.›Gapless sequence numbersstorage · low: Gap-free, monotonic numbering (invoices, journal entries) under concurrency and rollbacks+ 8 more techniques+ 48 more primitives

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Retail Link (supplier data and EDI portal)Walmart