Sal. Nu stiu daca postez in cel m nimerit loc, dar am ceva pt secu de pe forum.
Poţi să descifrezi acest cod? FBI îţi cere ajutorulFBI nu reuşeşte de 12 ani să descifreze un mesaj criptat şi a cerut ajutor. Mesajul constă într-o înşiruire de litere, cifre, paranteze şi alte caractere.
Povestea pe scurt: La 30 iunie 1999, poliţiştii din St. Louis, Missouri (SUA) au găsit cadavrul unui bărbat de 41 de ani şi singurele indicii pe care le-au găsit oamenii legii au fost două hârtii în buzunarele victimei, care conţineau mesaje criptate. Victima, Ricky McCormick, scria din copilărie mesaje criptate, potrivit familiei.
FBI încă nu a reuşit să le decripteze. Şeful criptologilor FBI, Dan Olson, a declarat că "suntem foarte buni în ceea ce facem, dar aici avem nevoie de nişte ajutor. Cineva care priveşte mesajul cu alţi ochi ar putea avea o idee genială, care să rezolve cazul. Am vrea să vedem cum rezolvă cineva acest mister. Este un cod de criptare complet necunoscut pentru noi".
Dacă ai reuşit să descifrezi codul, anunţă FBI aici:
FBI Laboratory
Cryptanalysis and Racketeering Records Unit
2501 Investigation Parkway
Quantico, VA 22135
Attn: Ricky McCormick Case
Textul de pe site-ul FBI http://www.fbi.gov/news/stories/2011/march/cryptanalysis_032911:
Update: This story has generated an outpouring of responses. To accommodate the continuing interest in this case, we have established a page (http://forms.fbi.gov/code) where the public can offer their comments and theories about the coded messages.Poţi să descifrezi acest cod? FBI îţi cere ajutorulCryptanalysts
Part 2: Help Solve an Open Murder Case
03/29/11
On June 30, 1999, sheriff’s officers in St. Louis, Missouri discovered the body of 41-year-old Ricky McCormick. He had been murdered and dumped in a field. The only clues regarding the homicide were two encrypted notes found in the victim’s pants pockets.
Despite extensive work by our Cryptanalysis and Racketeering Records Unit (CRRU), as well as help from the American Cryptogram Association, the meanings of those two coded notes remain a mystery to this day, and Ricky McCormick’s murderer has yet to face justice.
“We are really good at what we do,” said CRRU chief Dan Olson, “but we could use some help with this one.”
In fact, Ricky McCormick’s encrypted notes are one of CRRU’s top unsolved cases. “Breaking the code,” said Olson, “could reveal the victim’s whereabouts before his death and could lead to the solution of a homicide. Not every cipher we get arrives at our door under those circumstances.”
The more than 30 lines of coded material use a maddening variety of letters, numbers, dashes, and parentheses. McCormick was a high school dropout, but he was able to read and write and was said to be “street smart.” According to members of his family, McCormick had used such encrypted notes since he was a boy, but apparently no one in his family knows how to decipher the codes, and it’s unknown whether anyone besides McCormick could translate his secret language. Investigators believe the notes in McCormick’s pockets were written up to three days before his death.
Over the years, a number of CRRU’s examiners—who are experts at breaking codes—have puzzled over the McCormick notes and applied a variety of analytical techniques to tease out an answer. “Standard routes of cryptanalysis seem to have hit brick walls,” Olson noted. Our cryptanalysts have several plausible theories about the notes, but so far, there has been no solution.
To move the case forward, examiners need another sample of McCormick’s coded system—or a similar one—that might offer context to the mystery notes or allow valuable comparisons to be made. Or, short of new evidence, Olson said, “Maybe someone with a fresh set of eyes might come up with a brilliant new idea.”
That’s where the public comes in. The FBI has always relied on tips and other assistance from the public to solve crimes, and although breaking a code may represent a special circumstance, your help could aid the investigation. Take a look at McCormick’s two notes. If you have an idea how to break the code, have seen similar codes, or have any information about the Ricky McCormick case, send them to us online at
http://forms.fbi.gov/code write to CRRU at the following address:
FBI Laboratory
Cryptanalysis and Racketeering Records Unit
2501 Investigation Parkway
Quantico, VA 22135
Attn: Ricky McCormick Case
There is no reward being offered, just a challenge—and the satisfaction of knowing that your brain power might help bring a killer to justice.
“Even if we found out that he was writing a grocery list or a love letter,” Olson said, “we would still want to see how the code is solved. This is a cipher system we know nothing about.”
Part 1: Breaking Codes to Stop Crime
Resources
- More about the Cryptanalysis and Racketeering Records Unit
- Try your hand at code breaking
Breaking any code involves
four basic steps:
1. determining the language used;
2. determining the system used;
3. reconstructing the key; and
4. reconstructing the plaintext.
Consider this cipher: Nffu nf bu uif qbsl bu oppo.
Now apply the four steps:
1. Determining the language allows you to compare the cipher text to the suspected language. Our cryptanalysts usually start with English.
2. Determining the system: Is this cipher using rearranged words, replaced words, or perhaps letter substitution? In this case, it’s letter substitution.
3. Reconstructing the key: This step answers the question of how the code maker changed the letters. In our example, every character shifted one letter to the right in the alphabet.
4. Reconstructing the plaintext: By applying the key from the previous step, you now have a solution: Meet me at the park at noon.[/size]
intrebari