Move authentication out of the messaging inbox.
SMS OTP became the default second factor across Indian banking, fintech, and government authentication because it was universally reachable. The trust model rests on one assumption — that the OTP delivered to a phone reaches only the intended user. At today's scale, that assumption is under sustained pressure: phishing, OTP-forwarding malware, social engineering, and inbox-permissioned apps all sit on top of plaintext authentication value.
AmbiSecure's SIM-Auth platform replaces the plaintext-OTP pattern with an authentication flow processed inside the SIM/eSIM secure identity boundary — operator infrastructure as the trust substrate, the relying party never depending on a code that has to traverse the device messaging layer. The platform is engineered for India-scale deployment; the missing piece is telecom integration.
India telecom collaboration — sandbox to production.
The SIM-Auth platform is engineered, documented, and operator-evaluation-ready. The next step is integration inside a real telecom environment in India. AmbiSecure is opening structured conversations with Indian operators and operator-aligned ecosystem partners on four specific tracks:
Sandbox deployment
Integration inside an operator-controlled sandbox environment — protocol behaviour, applet residency, and key custody validated against operator engineering review.
Telecom integration pathway
Standards-aware integration with SIM/eSIM provisioning, OTA, and operator subscriber-identity infrastructure. Designed to interoperate, not to replace operator-side systems.
Operator-evaluation programme
Documented architecture, threat-model, and protocol walk-through with operator security and product teams. Built to be reviewed and challenged before any commitment.
Commercial participation
An operator-integrated authentication layer is a commercial position the operator can offer to bank, fintech, and government customers — not a feature given away. Structure of participation negotiable.
Consumer-safety contribution
Each integrated relying party reduces the share of authentication that rides on a plaintext code in the inbox — a measurable reduction in the structural surface that today's OTP fraud exploits.
Start the conversation
Reach the engineering team to scope a sandbox evaluation or a structured operator architecture review. Direct technical channel — no marketing intake form.
Contact AmbiSecure →Built by an India-based engineering organisation with four decades of embedded depth.
The SIM-Auth platform is engineered by the telecom-focused team inside AmbiSecure — the embedded security and trust capability of the Ambimat Group. Four-plus decades of hardware/software co-design, embedded systems, IoT, and connected-product manufacturing sits behind every layer of the trust architecture.
Ambimat Group ↗
Parent engineering organisation. Hardware/software co-design, embedded systems, IoT, manufacturing, and certification (FCC, CE, ISO 13485, FIDO) for PSUs, enterprises, and product companies.
Visit ambimat.com →AmbiSecure ↗
Embedded security and trust capability of the Ambimat Group. FIDO authenticators, secure-element applets, IoT identity, and hardware-backed authentication for enterprise and connected platforms.
Visit ambisecure.ambimat.com →SIM-Auth platform — this site
The telecom-focused authentication platform inside AmbiSecure. SIM/eSIM-resident authentication, eSIM/eUICC architecture, embedded PKI for telecom-grade fleets, and an operator-evaluation-ready engineering posture.
About this platform →Operated by Ambimat Group · Ahmedabad, India
Engineering capabilities for connected infrastructure.
Each capability addresses a specific layer of the identity, provisioning, and trust stack — built to interoperate with operator infrastructure and enterprise IoT environments.
SIM-Based Authentication
Architectural direction for telecom-grade authentication beyond SMS OTP — moving trust into the SIM/eSIM secure identity boundary with operator infrastructure as substrate.
Read the architecture →eSIM / eUICC Architecture
Embedded SIM and eUICC architecture, profile management workflows, and telecom-compatible integration models for IoT and connected-device fleets.
Explore capability →Secure Elements & Java Card
Java Card applet engineering and Secure Element integration — cryptographic isolation, hardware-backed identity, and embedded trust anchors.
Explore capability →IoT Identity & Lifecycle
Device identity, secure provisioning, lifecycle authentication, and offline-tolerant trust models for industrial and large-fleet IoT deployments.
Explore capability →Embedded PKI
Certificate hierarchies, attestation chains, and secure key custody adapted for embedded constraints — keys that stay where they belong.
Read overview →Device Attestation
Attestation that binds device identity to hardware roots of trust — verifiable claims about firmware, configuration, and provisioning state.
Read overview →Telecom Integration
Operator sandbox engagement, interoperability testing, conformance evidence, and India-localised infrastructure collaboration.
Explore capability →Built for the people on the other side of the table.
Engineering counterparts on operator, OEM, and enterprise teams whose job involves connected-device identity, trust, and infrastructure at scale.
Telecom operators
eSIM/eUICC engineering, RSP and SM-DP+ architecture, embedded PKI for telecom-grade fleets, and India-localised sandbox and interoperability work.
Connected-device OEMs
eUICC integration, applet engineering, Secure Element selection, attestation flows, and the trust chain from manufacturing line to deployed field unit.
Enterprise infrastructure
Embedded PKI, device identity at scale, hardware-backed authentication, and provisioning architecture for enterprise IoT and identity programs.
Fleet-scale deployments
Smart metering, industrial IoT, connected mobility, and asset-tracking fleets where identity, OTA discipline, and key custody must hold for years.
Secure manufacturing
Trust-chain engineering from line-side key injection through certificate issuance to field activation — auditable, reproducible, and reviewable.
Ecosystem partners
Silicon vendors, SE/eUICC providers, and integration partners working on operator-evaluable identity stacks for connected infrastructure.
Engineering that has shipped.
Architecture is necessary but not sufficient. The same engineering substrate behind this initiative has designed, built, branded, and licensed a public product in an adjacent identity domain — evidence the team can cross the gap from design to operated product.
Keyra — identity trust layer.
A product developed and licensed by Ambimat Electronics under the AmbiSecure SIM-Auth Platform. Keyra positions itself publicly as "the identity trust layer of the internet," with surfaces for individuals, businesses, and governments.
Adjacent domain, same engineering muscle — the discipline of taking an identity-and-trust product from architecture through naming, licensing, and operation transfers directly to the work documented on this site.
Architecture notes for engineering readers.
Concept-first articles on eSIM, eUICC, Secure Elements, embedded PKI, attestation, and the engineering decisions behind telecom-grade IoT identity.
Engineering counterpart for telecom-grade identity work.
Operator, OEM, or enterprise team working on eSIM/eUICC integration, secure provisioning, embedded PKI, or India-localised infrastructure collaboration — we'd welcome a structured technical conversation.