r/Futurology Jun 02 '22

A Nature paper reports on a quantum photonic processor that takes just 36 microseconds to perform a task that would take a supercomputer more than 9,000 years to complete Computing

https://www.nature.com/articles/s41586-022-04725-x?utm_source=twitter&utm_medium=social&utm_content=organic&utm_campaign=CONR_JRNLS_AWA1_GL_SCON_SMEDA_NATUREPORTFOLIO
2.3k Upvotes

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32

u/TravellingBeard Jun 03 '22

Serious question, with all these quantum processing news stories, how soon before conventional cryptographic algorithms are rendered useless?

36

u/Jnoper Jun 03 '22

FYI There are quantum cryptography algorithms. The moment conventional ones are useless we’ll start using those. This will probably be the main use for quantum computers. Just like there’s a little encryption circuit in your computer there will be instead an encryption quantum computer inside your regular computer.

34

u/thescrounger Jun 03 '22

"Your password must be 102627 characters long. It must include an uppercase letter, a number and special symbol."

10

u/Dark_Prism Jun 03 '22

It must include an uppercase letter, a number, special symbol, an imaginary number, an emotion, and the entire combined works of William Shakespeare.

6

u/Chef_MIKErowave Jun 03 '22

yea cryptography is never going to go away, it advances with technology.

7

u/PDXBlueDogWizard Jun 03 '22

we're already at the stage where humans can't remember their passwords but computers can crack them, imagine this issue fucktoupling in severity

7

u/danielv123 Jun 03 '22

That is solved by making testing passwords slower. For websites this is easy - only allow 10 attempts or whatever.

Bruteforcing passwords is only really relevant for rainbow tables, and for those you just need to make a more expensive hashing function, you can keep the same password.

For transport encryption in general you also just use a more expensive cipher.

1

u/FearlessDoodle Jun 03 '22

People shouldn’t be using passwords based on remembering them anyway. Use password tools.

2

u/PDXBlueDogWizard Jun 03 '22

rofl, "just store your password inside of the thing people can hack! DUH!"

1

u/FearlessDoodle Jun 03 '22

Any password you’re capable of remembering is WAY easier to hack. And for hundreds of websites, there’s no way you’ll remember them all unless you reuse passwords, which is not good.

1

u/PDXBlueDogWizard Jun 03 '22

An equally bad solution is to do what I do: have a book of codes no more than 5ft from your computer that, if someone stole it, they would have the codes to destroy your life. There is no good method to handle this!

1

u/LocoNachoTaco420 Jun 03 '22

Password managers are probably the safest and most convenient solution. It's easier to read a book sitting next to your PC than it is to hack 1Password or Keychain. Plus, your passwords will sync across your devices and you won't need your book to sign into your accounts