Fintech & Digital Assets
Digital asset custody: hot, warm and cold, and the controls between them
Losses at exchanges and custodians rarely come from broken cryptography. They come from weak controls around keys, approvals and withdrawals.
Crypto & Digital Assets
Crypto exchange, custody and payment technology for virtual-asset service providers, banks and fintechs operating under licence.
Overview
The hard part of a digital-asset business is not the trading screen. It is key management, segregation of client assets, on-chain monitoring and the travel-rule messages that must accompany transfers between providers. Those are the parts regulators examine first, and the parts we spend most of our time on.
We design custody with MPC or multi-signature wallets and hardware-backed cold storage, connect fiat on- and off-ramps through licensed banks and payment partners, and integrate blockchain analytics so suspicious wallets are caught before funds move. Where a client only needs to accept stablecoins from customers, we provide a lighter payment integration with conversion to local currency.
What the service covers
| Service | What it covers | Typical components |
|---|---|---|
| Exchange and brokerage | Spot crypto exchange and brokerage platforms with fiat on- and off-ramps through licensed partners. | Spot exchange, On/off-ramp, Brokerage |
| Custody and wallets | MPC and multi-signature wallets, cold storage and policy engines for institutional custody. | MPC, Multi-sig, Cold storage |
| Crypto and stablecoin payments | Accept and settle in stablecoins and crypto, converted to local currency where regulation allows. | Stablecoins, Merchant settlement, Conversion |
| Digital-asset compliance | On-chain analytics, wallet screening and travel-rule messaging for virtual-asset service providers. | On-chain analytics, Travel rule, Wallet screening |
How we deliver
Discovery and regulation
We map the product, the users, the licences required and the partners who hold them.
Architecture
A modular, API-first design that adds rails, currencies and assets without a rebuild.
Build and integrate
Platform engineering and connections to banks, schemes, exchanges, custodians and blockchains.
Secure and certify
Penetration testing, PCI and ISO controls, and audit evidence before launch.
Operate and grow
Monitoring, reconciliation, support and continuous improvement under service levels.
From our insights
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Fintech & Digital Assets
PCI DSS v4: what changed for merchants and acquirers
The requirements that were "best practice" until March 2025 are now mandatory. Most of them land on payment pages, authentication and the way risk is documented.
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Fintech & Digital Assets
ISO 20022 and the remittance counter: what exchange houses need to change
Cross-border payment messages have moved to ISO 20022. The richer data only helps if it is captured correctly at the counter and in the app.
Talk to us about Crypto & Digital Assets
Send us the details and the practice lead will reply within one business day.