How does post-quantum cryptography work?

Post-quantum cryptography refers to cryptographic algorithms (usually public-key algorithms) that are thought to be secure against an attack by a quantum computer. Unlike mathematical encryption, quantum cryptography uses the principles of quantum mechanics to encrypt data and making it virtually unhackable.

Why is post-quantum cryptography important?

The goal of post-quantum cryptography (also called quantum-resistant cryptography) is to develop cryptographic systems that are secure against both quantum and classical computers, and can interoperate with existing communications protocols and networks.

What is post-quantum key exchange?

Our approach ties lattice-based key exchange together with traditional authentication using RSA or elliptic curve digital signatures: the post-quantum key exchange provides forward secrecy against future quantum attackers, while authentication can be provided using RSA keys that are issued by today’s commercial …

What is the difference between quantum cryptography and post quantum cryptography?

While quantum cryptography describes using quantum phenomena at the core of a security strategy, post-quantum cryptography (sometimes referred to as quantum-proof, quantum-safe or quantum-resistant) refers to cryptographic algorithms (usually public-key algorithms) that are thought to be secure against an attack by a …

Is ECC quantum safe?

Ciphers like RSA and ECC are not quantum safe because they are not able to adapt by increasing their key sizes to outpace the rate of development of quantum computing. In order to attack a 3072-bit RSA key, for instance, a quantum computer must have a few thousand logical qubits.

Is quantum cryptography better than ECC?

ECC is not post-quantum secure, so in your comparison quantum cryptography is stronger. That said, quantum cryptography in its present form is a key exchange, rather than encrypting data. A stronger alternative to ECC is lattice-based cryptography, which is shown to be post-quantum secure.