This is a sensationalist headline, and this is not a strong password length. Based on the information in the article, this is really equivalent to a "strong" 5-character password - not very secure.
It's not "30-character unbreakable cryptography", you can crack it in minutes on your phone or desktop.
Technical details:
The article actually says that each 'character' you learn is one of only 6 possibilties - for only 2.5 bits per character and total entropy of 38 bits.
To see how woefully little entropy this is, if you code, try writing a program that counts to 2^38 - or on a 32-bit system go through the 4.2bn possible values of an integer 64 times. That's how many possible keys there are in a 38-bit password. It really just takes minutes - certainly far less than the 45 minutes the article says it takes to learn this password!
just want to point out that the "entropy of 38 bits" comes from the researchers - the first character has entropy of 2.5 bits but not all 30-length 'passwords' are valid, only a very small number of them, according to the researchers.
38-bit keys/passwords are not secure by any stretch of the imagination, no matter how they are chosen. (i.e. even the best random number generator on Earth doesn't help if you can just try every possibility in minutes.)
It's not "30-character unbreakable cryptography", you can crack it in minutes on your phone or desktop.
Technical details:
The article actually says that each 'character' you learn is one of only 6 possibilties - for only 2.5 bits per character and total entropy of 38 bits.
To see how woefully little entropy this is, if you code, try writing a program that counts to 2^38 - or on a 32-bit system go through the 4.2bn possible values of an integer 64 times. That's how many possible keys there are in a 38-bit password. It really just takes minutes - certainly far less than the 45 minutes the article says it takes to learn this password!