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.
Public Key Cryptosystem. In Symmetric or Private Key cryptosystems the encryption and decryption keys are either the same or can be easily found from each other. Public Key Cryptosystem (PKC) was introduced in 1976 by Diffie and Hellman. In PKC different keys are used for encryption and decryption. Alice: