Post‑quantum blockchain merges two complex fields: quantum physics and cryptocurrencies. To navigate the topic, you need a dictionary. Below are 50 key terms – from “Shor’s algorithm” to “two‑layer sharding”, from NIST to Cellframe. No fluff, just definitions.
A‑B
1. Algorithm ID – A byte in a Cellframe signature or address that specifies which cryptographic algorithm is used. Enables cryptography upgrades without hard forks.
2. Attestation – A validator’s vote in PoS networks confirming the correctness of a block. Used in Ethereum and Cellframe consensus.
3. Bell state – A maximally entangled state of two qubits. The four Bell states form a basis for quantum computing.
4. BIP‑360 – Bitcoin Improvement Proposal for quantum protection. Introduces P2MR addresses to fix Taproot’s vulnerability. Does not protect against mempool attacks.
5. Bit – Classical unit of information (0 or 1). Unlike a qubit, it cannot be in superposition.
6. Bridge – A protocol for transferring assets between different blockchains. Cellframe uses a two‑way bridge audited by CyStack.
C‑D
7. Cellframe – A post‑quantum L0 blockchain platform using NIST algorithms Falcon, CRYSTALS‑Dilithium, SPHINCS+ and Kyber 512. Allows cryptography upgrades without hard forks.
8. CertiK Skynet – A real‑time blockchain security monitoring system. Gave Cellframe an “A” rating.
9. CF‑20 – Cellframe’s fungible token standard (analogous to ERC‑20) with post‑quantum protection.
10. CF‑721 – Cellframe’s NFT standard (analogous to ERC‑721) with post‑quantum protection.
11. Consensus – The mechanism by which blockchain nodes agree on the state of the ledger. Main types: PoW, PoS, ESBOCS.
12. CRQC (Cryptographically Relevant Quantum Computer) – A quantum computer capable of breaking practical cryptography (RSA, ECDSA). 2026 estimates suggest 2029–2032.
13. CRYSTALS‑Dilithium (ML‑DSA) – NIST standard (FIPS 204) for lattice‑based post‑quantum digital signatures. Cellframe’s primary algorithm.
14. Decoherence – Loss of quantum coherence when a qubit interacts with the environment. The main technical challenge for quantum computers.
E‑F
15. ECDSA (Elliptic Curve Digital Signature Algorithm) – Digital signature algorithm used by Bitcoin and Ethereum. Vulnerable to Shor’s algorithm.
16. Entanglement (quantum entanglement) – Correlation between two qubits such that measuring one instantly determines the state of the other, regardless of distance.
17. ESBOCS (Extended Stochastic Bound Consensus) – Cellframe’s modified PoS consensus optimised for post‑quantum cryptography. Uses small validator groups (up to 10) to sign each block.
18. eUTXO (Extended Unspent Transaction Output) – Cardano’s accounting model, which hides public keys longer than Bitcoin’s UTXO, providing better protection against at‑rest quantum attacks.
19. Falcon (FN‑DSA) – Compact lattice‑based post‑quantum signature algorithm. Expected NIST standard (FIPS 206). Used in Cellframe for transactions.
20. FIPS (Federal Information Processing Standards) – Mandatory standards for US federal agencies. FIPS 203‑205 are NIST’s post‑quantum standards.
G‑L
21. Glossary – What you are reading now. A list of terms with definitions for quick understanding.
22. Harvest now, decrypt later – A strategy where attackers scan blockchains today and store public keys to crack them after a quantum computer exists.
23. Interference – A quantum effect that amplifies correct computational paths and cancels incorrect ones. Used in quantum algorithms.
24. Kyber 512 (ML‑KEM) – NIST standard (FIPS 203) for post‑quantum key encapsulation. Used in Cellframe for secure communication channels.
25. L0 (Layer 0) – Foundational infrastructure that connects different blockchains. Cellframe is an L0 platform.
26. L1 (Layer 1) – The base blockchain where the ledger lives. Examples: Bitcoin, Ethereum, and Cellframe’s L1 parachains (KelVPN, Backbone).
27. L2 (Layer 2) – Scaling solutions built on top of L1 (rollups, payment channels). Not to be confused with Cellframe’s two‑layer sharding.
28. Logical qubit – A “corrected” qubit built from many physical qubits using error correction. Estimates for breaking ECC‑256: ~1,200‑1,450 logical qubits.
M‑Q
29. mCELL (m‑token) – A token received when staking CELL in Cellframe. Gives the right to run a master node or delegate to a validator. Not freely transferable.
30. Mempool – The queue of unconfirmed transactions waiting to be included in a block.
31. Mining – The process of creating new blocks in PoW by solving a cryptographic puzzle.
32. ML‑DSA – See CRYSTALS‑Dilithium.
33. ML‑KEM – See Kyber 512.
34. NFT (Non‑Fungible Token) – A unique token with a unique identifier. Cellframe supports the CF‑721 standard.
35. NIST (National Institute of Standards and Technology) – The US federal agency that approves cryptographic algorithms. The global authority for post‑quantum standards.
36. Nonce – A one‑time number that miners iterate in PoW to find a hash satisfying the difficulty target.
37. P2PK (Pay‑to‑Public‑Key) – An early Bitcoin address format where the public key is always visible on the blockchain. Holds ~1.7 million BTC (Satoshi’s coins).
38. P2TR (Pay‑to‑Taproot) – Bitcoin Taproot addresses, where public keys are visible by default. Increases the vulnerable surface.
39. Physical qubit – A real qubit implemented in hardware (superconducting, trapped ion, neutral atom). Many physical qubits are needed to create one logical qubit.
40. Post‑quantum cryptography (PQC) – Algorithms resistant to quantum computer attacks. Do not require quantum hardware.
41. Proof‑of‑Stake (PoS) – Consensus where the right to create a block is determined by the amount of staked coins. Used by Ethereum, Cardano, Solana.
42. Proof‑of‑Work (PoW) – Consensus that requires computational work. Used by Bitcoin, Litecoin.
43. Q‑day (Quantum day) – The hypothetical day when a quantum computer can break modern cryptography (RSA, ECDSA). 2026 estimates: 2029–2032.
44. QRL (Quantum Resistant Ledger) – One of the first post‑quantum blockchains (since 2018), using XMSS hash‑based signatures.
45. Quantum advantage – The point where a quantum computer solves a practical problem faster than the best classical supercomputer. Expected 2026‑2027.
46. Quantum computer – A computing machine that uses qubits, superposition, and entanglement to solve problems inaccessible to classical computers.
47. Quantum utility – The stage where a quantum computer solves a problem beyond classical brute‑force. Achieved in 2023 (IBM Eagle).
48. Qubit – Basic unit of quantum information. Can be in superposition of 0 and 1 simultaneously.
49. Qverify – The company that audited Cellframe’s post‑quantum implementation in August 2025, confirming NIST compliance.
50. Slashing – A penalty in PoS networks: burning part of a validator’s stake for rule violations (double signing, long offline periods).
S‑Z (continued)
51. Shor’s algorithm – A quantum algorithm that efficiently factorises integers and solves discrete logarithms – the reason ECDSA and RSA are vulnerable.
52. SPHINCS+ (SLH‑DSA) – NIST standard (FIPS 205) for hash‑based post‑quantum signatures. Available in Cellframe SDK as a backup.
53. Superposition – The ability of a quantum system to exist in multiple states simultaneously. A qubit in superposition is both 0 and 1 at once.
54. Taproot – Bitcoin’s 2021 upgrade. Google’s March 2026 paper warns it may have widened the quantum attack surface by making public keys visible by default.
55. Two‑layer sharding – Cellframe’s architecture: first layer – independent L1 blockchains for different services; second layer – dynamic cells within each L1 for parallel transaction processing.
56. Validator committee – In ESBOCS, a small random group (up to 10 validators) that signs a block instead of the whole network.
57. Wavefunction collapse – The “collapse” of superposition into a single definite state upon measurement.
58. Zero‑knowledge proof (ZK‑proof) – A cryptographic method that proves a statement true without revealing any additional information.
How to Use This Glossary
This glossary is designed for quick lookup. If you encounter an unfamiliar term in an article about Cellframe or quantum security, come back here. Definitions are straight to the point – no fluff.
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