- The XRP Ledger uses CRYSTALS-Dilithium as the digital signature encryption standard.
- Unlike the previously used elliptic curve cryptography, the new standard is not vulnerable to attacks from quantum computers.
Q-Day, the day when quantum computers will be able to crack widely used public-key cryptography, is approaching. Although there is no consensus on the timeline among experts, the cryptocurrency world is preparing for a post-quantum world. The latest XRP Ledger, which has been upgraded to quantum-proof standards, employs new encryption standards.
AlphaNet, the network reserved by developers to test the initial features of the XRP Ledger, has “quantified,” announced Denis Angell, a software engineer at XRPL Labs. He added that the network’s consensus, accounts, and transactions are now fully quantum secure.
AlphaNet is now QUANTUM
XRPL’s developer network is now fully quantum secure.
as much as the consensus
quantum account
quantum transaction
dilithium encryptionOh, and we also added native smart contracts
The quantum-resistant future of blockchain is real.
— Dennis Angel (@angell_denis) December 24, 2025
XRPL has utilized Elliptic Curve Cryptography (ECC) for account authentication and transaction signing. ECC is the most popular standard, with Bitcoin, Ethereum, Solana, Cardano, Polkadot, Avalanche, Stella, and other major blockchains all relying on it, although implementations vary.
It was impossible to break ECC with today’s classical computers. That discrete logarithm math problem is so difficult that no ordinary computer can recover the private key from the public key (or, more simply, the public key cannot be reverse engineered to reveal the private key). However, quantum computers can also solve this challenge and obtain private keys or forge digital signatures.
XRPL is now quantum-enabled
XRPL will now run on CRYSTALS-Dillithium, a new digital signature scheme designed to withstand quantum attacks. It signs transactions just like ECC, but relies on lattice-based encryption, so there is no known workaround even for the most powerful quantum computers.
JUST IN: #XRPL is a pioneer in quantum-proof transactions using dilithium cryptography, giving it an edge in blockchain security. pic.twitter.com/RuSPtnCsWz
— RippleXity (@RippleXity) December 26, 2025
CRYSTALS-Dillithium makes XRPL quantum secure, but at a cost. First, the keys and signatures are much longer (approximately 40 times larger) and have higher bandwidth and storage costs. This can cause blocks to fill up faster, require nodes to relay more data, and ultimately lead to higher transaction fees. Transactions can also be slow, especially for high-throughput chains like XRPL.
XRPL is collaborating with other companies such as Algorand and Solana to test post-quantum technologies. Algorand has implemented Falcon, yet another signature scheme that relies on lattice-based encryption. As reported by CNF, just recently, Aptos proposed the first post-quantum digital signature scheme based on the AIP-137 proposal. The scheme, called SLH-DSA-SHA2-128s, will be rolled out in stages, giving users the option to upgrade or rely on a slower, less secure scheme.
XRP trading hours $1.84despite a slight increase over the past day. 40% Decline in trading volume.
