Problem & Solution¶

The Challenge — Secure, Ephemeral Information## Azure Reference Architecture¶

graph TD GA["GitHub Actions"] --> ACR["Azure Container Registry"] ACR --> AKS["AKS Cluster"] AKS --> AGW["App Gateway + WAF"] KV["Azure Key Vault"] -->|"Managed Id"| AKS COSMOS["Cosmos DB (TTL)"] -->|"Private Endpoint"| AKS LOG["Azure Monitor"] --> AKS

---rise Scale

Even in zero‑trust enterprises, sensitive data still bounces around email servers, chat tools, and cloud drives. Those artefacts linger, magnifying the blast radius of any breach and bloating compliance scope.

Pain Points¶

⚠️ Pain	Why It Hurts
Persistent data trails	Messages live forever in mailbox stores, ticket systems, and backups. Hard to purge, easy to exploit.
Shallow encryption	Many tools stop at TLS; data rests on servers in plaintext. Violates zero‑trust assumptions.
Over‑privileged access	“Share” often means forever; no automatic revocation, big insider‑risk window.
Cumbersome PKI	Heavy key‑exchange workflows stall adoption, so users bypass them.

The Solution — Transio’s Zero‑Knowledge Platform¶

Transio delivers one‑time, self‑destructing secrets with client‑side encryption, wrapped in fully automated Azure infrastructure.

Technical Highlights¶

🚀 Capability	How Transio Delivers
Production AKS stack	Modular Bicep IaC, GitHub Actions CI/CD, private networking, App Gateway + WAF.
Dual‑layer crypto	Browser E2EE (Argon2id + AES‑256‑GCM) or server‑side Fernet via Key Vault.
Zero persistence	Cosmos DB TTL + one‑time access → nothing recoverable post‑read.
Zero‑knowledge	Even a full infra compromise can’t decrypt E2EE payloads.
Cloud‑native DevOps	Helm charts, automated image scanning, Workload Identity (no secrets in pipelines).

Threat‑Model Snapshots¶

Advanced Persistent Threat

Needs both Key Vault compromise and client passphrase to read data.

Insider Threat

Admins and DBAs see only ciphertext; no privilege escalation path to clear‑text.

Compliance

GDPR Art 17 right‑to‑erasure honoured via TTL; strong cryptography meets PCI/HIPAA.

Illustrative Code Snippets¶

Client‑side E2EE

const { hash: key } = await argon2.hash({
  pass: passPhrase,
  salt,
  hashLen: 32,
  time: 2,
  mem: 1 << 16, // 64 MiB
  type: argon2.ArgonType.Argon2id
});
const ct = await crypto.subtle.encrypt({ name: 'AES-GCM', iv: nonce }, key, text);

Server‑side MultiFernet

keys = Config.MASTER_KEYS
cipher = MultiFernet([Fernet(k) for k in keys])
enc = cipher.encrypt(secret.encode())

Azure Reference Architecture¶

graph TD GA[GitHub Actions] --> ACR[Azure Container Registry] ACR --> AKS[AKS Cluster] AKS --> AGW[App Gateway + WAF] KV[Azure Key Vault] -->|Managed Id| AKS COSMOS[Cosmos DB (TTL)] -->|Private Endpoint| AKS LOG[Azure Monitor] --> AKS style KV fill:#e1f5fe style COSMOS fill:#ffebee style LOG fill:#f3e5f5

Enterprise Impact¶

Domain	What Transio Enables
DevOps	Rotate CI/CD secrets safely; share DB creds with TTL.
SecOps	Transmit investigation notes that auto‑purge.
Compliance	Send audit evidence, then destroy link post‑review.
Exec Comms	Share board‑level info without digital residue.

Skills Demonstrated¶

Azure platform engineering – AKS, Key Vault, App Gateway, Cosmos DB, Monitor.
IaC mastery – multi‑layer Bicep, environment parameterisation.
Secure DevOps – GitHub Actions + Trivy + CodeQL gates.
Cryptographic engineering – Argon2id, AES‑GCM, MultiFernet.
Zero‑trust design – Workload Identity, private endpoints, no static creds.

Transio bridges the gap between security and usability—proving that airtight, zero‑knowledge sharing can be cloud‑native, automated, and developer‑friendly.