It became a national holiday in 1948, but it has been a day of celebration in Japan since ancient times. The fifth day of the fifth month was traditionally called Tango no Sekku and was a festival for boys. Girls have their own festival, called Hina Matsuri (Doll Festival), held on the third day of the third month.
Expressions full disk encryption (FDE) or whole disk encryption signify that everything on disk is encrypted, but the master boot record (MBR), or similar area of a bootable disk, with code that starts the operating system loading sequence, is not encrypted.
The public key generated is unique to your computer, not the encrypted file. This information, in conjunction with an understanding of the file format used to store encrypted files meant that Kyrus Technologies were able to create an effective decryption tool. But there was one problem. Although there was a tool to decrypt files, it was useless without the private encryption keys. As a result, the only way to unlock a file encrypted with CryptoLocker was with the private key. Thankfully, FireEye and Fox-IT has acquired a significant proportion of the Cryptolocker private keys.