BLAKFRAME LTD is a systems engineering firm registered in England and Wales (Company No. 16726125) — verifiable at Companies House. The firm works where software correctness must hold for all inputs, not most of them — and where the failure modes are memory corruption, undefined behaviour, and divergence between specification and execution. Its work is twofold: the development of BLAKHOLE, the firm's principal engineering effort, and an active security research practice on low-level and cryptographic software, which is the firm's main source of income.
Both lines of work are conducted in-house and reinforce each other: the research examines how systems fail; the engineering applies that knowledge to how systems are built. The firm is self-funded, holds no external investors, and offers no consumer products. What it does not publish, it does not publish.
Director & Systems Architect
David Tsarskykh is the sole director of BLAKFRAME LTD and leads its engineering and research work. He directs the BLAKHOLE development effort and the firm's security research practice, from requirements to verification. His appointment and the firm's registration are verifiable at Companies House.
The firm conducts security research on low-level and cryptographic software — its main source of income — and develops BLAKHOLE, its principal engineering effort, in-house. BLAKHOLE is not licensed, hosted, or sold as a product. Security research findings are reported to the affected maintainers under coordinated disclosure.
Software whose correctness must be established before reliance: components where a single unhandled boundary value, one unsafe operation, or a divergence between specification and execution invalidates the whole. The engineering requirements of this class are strict — memory safety, defined behaviour at every boundary, reproducible execution — and the firm's development work exists because meeting them with conventional tooling alone does not suffice.
The analysis of software systems for defects that testing alone does not reveal — implementation-level flaws in cryptographic protocols, unsafe handling in critical execution paths, and divergence between a specification and its implementation. Findings are reported to the affected maintainers under coordinated disclosure. The firm does not develop offensive capabilities, does not sell exploits, and does not provide surveillance or interception services.
Development. BLAKHOLE is in active development, and the security research practice is ongoing. The firm does not publish internal milestones; announcements follow completion, not schedule.
Business-to-business, on a principal-to-principal basis, under separate agreements per engagement. Counterparties receive the technical material the engagement requires. General and institutional enquiries: enquiries@blakframe.com. Security matters: security@blakframe.com.
No. BLAKHOLE is developed in-house, for the firm's own operation and for contracted engagements. It is not licensed, hosted, or sold as a product, and there is no self-service access. Engagements begin with a conversation, not a checkout.
