卡尔达诺 (Cardano)于2017年9月27日成立

Ripple was founded September 2012

卡尔达诺(Cardano)由以太坊 (Ethereum)的联合创始人之一，技术专家Jeremy Wood和＆nbsp; Charles Hoskinson创建的。

Originally founded as OpenCoin, the startup behind XRP later changed its name to Ripple Labs in 2013 before settling on Ripple in late 2015.

Ripple now acts as principal steward in the funding and development of XRP and plays a big role in its development and digital economy.

ADA

XRP

Cardano’s primary use case is to allow transactions in its native cryptocurrency, ADA, and to enable developers to build secure decentralized applications powered by it.

However, Cardano differs from other blockchain projects by emphasizing a research-driven approach to design, aiming to achieve an academic rigor it believes will propel adoption of its technology.

While Cardano may not promise new ground-breaking features, users and developers may find its cryptocurrency offers appealing optimizations based on scientific research and formal verification, a process by which its code is verified mathematically.

Further, Cardano is released in phases and has seen 5 major platform upgrades since 2017, including Byron, which enabled the transfer for ADA cryptocurrency for the first time and Voltaire, which introduced a new model for how users could fund development for software changes. 
 

XRP was created to complement traditional payments by migrating transactions that occur today within financial institutions to a more open infrastructure.

In order for XRP to work, Ripple built the XRP ledger, a software that introduced a new way of operating a blockchain’s transaction and records system.

Similar to Bitcoin, the XRP ledger allows users to send and receive its XRP cryptocurrency using digital signatures.

卡尔达诺(Cardano)是由三个独立的机构维持的。

The 卡尔达诺基金会负责监督卡尔达诺区块链的开发。

IOHK 建立了卡尔达诺并设计了Ouroboros，即卡尔达诺用来运行其网络的权益证明的共识算法。

Emurgo 即助于鼓励企业和大型机构采用卡尔达诺的技术。

在其推出之时，卡尔达诺大约创建了310亿艾达币(ADA)，其中近260亿由一家受雇管理此次销售的日本公司來出售给投资者。 参与者可以购买代金券，以便以后在该软件发行时可将其兑换成艾达币(ADA)。

Upon the launch of XRP, Ripple initially distributed 45 billion XRP to users on forums through various giveaways. The remaining XRP is being escrowed by the company to fund its technology development.

However, the distribution of its tokens continue to cause debate due to Ripple being a for-profit company. This has enabled it to be the principal steward and key decision maker in the funding and development of the XRP Ledger, a controversial stance in the distributed world of cryptocurrencies today.

To secure its network, Cardano uses Ouroboros, a consensus mechanism similar to Proof of Stake (PoS) ones that enables users to validate transactions and earn newly minted ADA.

Ouroboros divides time into epochs and slots, where epochs are the overarching time frames, and slots are 20-second increments within epochs.

Within each slot, a slot leader is randomly chosen and is responsible for choosing the blocks that get added to the blockchain.

Once the epoch has ended, the previous slot leaders elect the slot leaders of the next epoch.

Central to the XRP cryptocurrency is the XRP Ledger, the technology that allows users to send and receive cryptocurrency using public- and private-key cryptography and enables servers to send transactions for consideration by its network.

The XRP Ledger differs from Bitcoin in that it does not use mining or require specialized computing hardware to secure its ledger and validate transactions. Only specific nodes, called unique nodes, can validate transactions on the network.

This design was intended for nodes to quickly validate transactions in an attempt to mirror transactions that occur today between databases controlled by financial institutions.

ADA is the main cryptocurrency powering Cardano, is minted every block and distributed to slot leaders as rewards for verifying transactions.

Like many other cryptocurrencies, the supply of ADA tokens is limited, meaning that according to the software’s rules there will only ever be 45 billion ADA.

In early 2021, 31 billion ADA were in circulation, with the remaining 14 billion scheduled to be issued through minting.

While the XRP Ledger does not require transaction fees in the way Bitcoin does to reward miners,  it does mandate that a small amount of XRP be put up by the sender to be destroyed and deducted from the total supply. 

Like Bitcoin, the supply of XRP is limited, meaning that according to the software’s rules there will only ever be 100 billion XRP.