Using the Mixed Alphabet we get: ETYR QVYIQX OBW, UBTYIYMY VEO OYIQ QJ MJHY JI E RBKGJHEQBC HBOOBJI. BQ VEO AYMY QAEQ AY NYCEHY ECLSEBIQYR VBQA QAY VMBQBITO JP EGNYMQB, QMBQAYHBSO EIR KJMQE, EIR ABO BIQYMYOQ BI CMXKQJTMEKAX VEO BTIBQYR. PJM HEIX XYEMO, CMXKQJTMEKAX VEO IJQABIT HJMY QAEI E QJJG QAEQ AYGKYR ABH ABO RBKGJHEQBC VJMF, NSQ EQ QAY ETY JP QABMQX IBIY, UBTYIYMY RYCBRYR QAEQ AY AER EHEOOYR YIJSTA HJIYX QJ NY ENGY QJ ENEIRJI ABO CEMYYM EIR CJICYIQMEQY JI E GBPY JP OQSRX. BQ VEO JIGX QAYI QAEQ AY NYTEI MYOYEMCA BIQJ E IYV CBKAYM.

Security researchers have successfully broken one of the most secure encryption algorithms, 4096-bit RSA, by listening — yes, with a microphone — to a computer as it decrypts some encrypted data. Playstation 2 Games .iso. The attack is fairly simple and can be carried out with rudimentary hardware. The repercussions for the average computer user are minimal, but if you’re a secret agent, power user, or some other kind of encryption-using miscreant, you may want to reach for the Rammstein when decrypting your data. This, carried out by Daniel Genkin, Adi Shamir (who co-invented RSA), and Eran Tromer, uses what’s known as a side channel attack.

A side channel is an attack vector that is non-direct and unconventional, and thus hasn’t been properly secured. For example, your pass code prevents me from directly attacking your phone — but if I could work out your pass code by looking at the greasy smudges on your screen, that would be a side channel attack. In this case, the security researchers listen to the high-pitched (10 to 150 KHz) sounds produced by your computer as it decrypts data. This might sound crazy, but with the right hardware it’s actually not that hard. For a start, if you know exactly what frequency to listen out for, you can use low- and high-pass filters to ensure that you only have the sounds that emanate from your PC while the CPU decrypts data.

(In case you were wondering, the acoustic signal is actually generated by the CPU’s voltage regulator, as it tries to maintain a constant voltage during wildly varied and bursty loads). Then, once you have the signal, it’s time for the hard bit: Actually making sense of it. Here you can see the frequency spectrogram of various CPU instructions (down the right hand side) Without going into too much detail, the researchers focused on a very specific encryption implementation: The GnuPG (an open/free version of PGP) 1.x implementation of the RSA cryptosystem.

The Vigenere encryption. Crack Winning Eleven 7 International on this page. Directions: Enter message in the top text field, and shift number unless you want to use what is there. You can copy and paste from. Crypto Analysis to Crack Vigenere Ciphers (This post assumes some familiarity with both Vigenere and Ceasar Shift Ciphers. The Vigenere encryption was the creation of the French diplomat, Blaise de Vigenere, 1523-1596. Like Caesar and all the cryptographers that followed, he did not visualize the cipher in modular arithmetical terms.

With some very clever cryptanalysis, the researchers were able to listen for telltale signs that the CPU was decrypting some data, and then listening to the following stream of sounds to divine the decryption key. The same attack would not work on different cryptosystems or different encryption software — they’d have to start back at the beginning and work out all of the tell-tale sounds from scratch. The researchers successfully extracted decryption keys over a distance of four meters (13 feet) with a high-quality parabolic microphone. Perhaps more intriguingly, though, they also managed to pull of this attack with a smartphone placed 30 centimeters (12 inches) away from the target laptop. The researchers performed the attack on different laptops and desktops, with varying levels of success.

For what it’s worth, the same kind of electrical data can also be divined from many other sources — the power socket on the wall, the remote end of an Ethernet cable, or merely by touching the computer (while measuring your body’s potential relative to the room’s ground potential). In this light-weight setup, only the microphone (B) needs to be positioned correctly — everything else could be hidden away, for stealthy snooping In terms of real-world repercussions, acoustic cryptanalysis is actually surprisingly dangerous. Imagine if you were decrypting some files in a library, coffee shop, or other public space — someone could obtain your decryption key just by placing their phone near your computer.

Alternatively, an attacker could use spear phishing to put malware on your phone that listens for the decryption key. With HTML5 and Flash able to access the microphone, it would be possible to build a website that listens for encryption keys too. The researchers propose one particularly nefarious scenario: Put a microphone into a co-located server, slot it into a rack in a data center, and then scoop up the encryption keys from hundreds of nearby servers.

If you want to keep your data secure, you only really have two viable options: Heavy-duty encryption, physical security, and ideally both at the same time. If an attacker can’t get physically close to your data, it instantly becomes much harder to steal it. As far as mitigating acoustic cryptanalysis attacks, you either implement physical security — keep your laptop in a sound-tight box, or never let anyone near your computer when you’re decrypting data — or you need to use a “sufficiently strong wide-band noise source.” Something like a swooping, large-orchestra classical concerto would probably do it. Research paper: [PDF]. What if it didnt take them months? What if they’re already working on every possible combination of CPU-Encryption Algorithm-Software possible? If they purport to be able to do this with a freakin’ smartphone, no way in hell it took months. Even if they’re not the ones working on it, the news of this encryption breakage means all kinds of hackers will come out of the woodworks and try their own methods and combinations.