Research Article
The Applications of Blockchain in the Covert Communication
Table 1
Mainstream digital currencies on blockchain (updated Feb. 28, 2022).
| | Name | Symbol | Type | Signing Alg | Curve | Pros | Cons | Circulating supply |
| | Bitcoin | BTC | UTXO | ECDSA | secp256k1 | Independence from central authorities; user anonymity and transparency. | No government regulations;
limited use. | 18,970,150 BTC | | Ethereum | ETH | account | ECDSA | secp256k1 | Second-biggest cryptocurrency;
fast transaction speed. | Uncapped supply leads to inflation. | 119,761,811 ETH | | Ripple | XRP | account | ECDSA | secp256k1 | Lightning fast transaction
speed; cheap. | Less secure consensus protocol. | 47,949,281,138 XRP | | Litecoin | LTC | UTXO | ECDSA | secp256k1 | Faster confirmation;
cheap transaction fee. | Low market captalisation. | 69,734,906 LTC | | Zcash | ZEC | UTXO | ECDSA,
zk-SNARKs | secp256k1 | Prominent level of anonymity;
fungible and interchangeable. | Restricted to CPU mining. | 13,841,481 ZEC | | Monero | XMR | UTXO | ECC,
MLSAG | ed25519 | Block limit flexibility;
well security. | No mobile wallet;
weak scalability. | 18,085,509 XMR | | Dash | DASH | UTXO | ECDSA | secp256k1 | Faster confirmation speed;
lower transaction fee. | Theoretical traceability. | 10,603,264 DASH | | Stellar | XLM | account | EdDSA | ed25519 | Integrates with banks. | Not widely recognized. | 24,943,914,340 XLM |
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