Vladyslav

Quantum computers threaten to break most modern cryptography within minutes — perhaps seconds. The theoretical threat is becoming practical reality.

What stands to be compromised:

Financial systems and transactions

Government communications and classified information

Medical records and health data

Corporate trade secrets and intellectual property

Personal communications and private messages

The "harvest now, decrypt later" strategy is already in use. State actors are collecting encrypted data today, anticipating future quantum decryption capabilities.

NIST's post-quantum cryptography competition has identified promising algorithms across several approaches: lattice-based, code-based, multivariate, and hash-based cryptography. Each presents trade-offs in performance, key size, and implementation complexity.

The transition will cost billions globally. The geopolitical stakes are immense: the nation that achieves practical quantum computing first gains unprecedented strategic advantage — the ability to decrypt adversaries' communications, access protected state secrets, and undermine financial systems.

This is a quantum arms race. The winner may effectively read the digital world's thoughts.
https://newsgroup.site/quantum-computing-cryptography-threat-encryption-2026/
#QuantumComputing #Cryptography #PostQuantum #NIST #CyberSecurity #DataPrivacy

Mar 21 at 2:40pmWeb
Show threadJohn Deters1d ago
@newsgroup That's not how quantum cryptography works. First, factoring one key will take time and millions of $$$: if a 1024 bit RSA key can be factored in a day (still nowhere near possible on today's QCs) then a 2048 bit RSA key, used on many TLS root certificates, will take a year or more. And you still have to intercept the connection to insert your forged certificate. Direct TLS decryption is the same amount of effort as key cracking, but is only applicable to a single TLS session.
Show threadJohn Deters1d ago
@newsgroup Yes, people do need to move to post-quantum algorithms, but the need is not instant; the house is not yet on fire. First crack might be possible by 2030 (the US mandated date for PQ deployment by Federal systems), but more likely it will be a decade from now.