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Sinopsis
Mengapa RSA tidak cocok / pas untuk enkripsi sebuag file binary Berikut penjelasannya:
referensi : http://stackoverflow.com/questions/16546959/how-to-do-encryption-and-decryption-of-a-file
RSA is not designed to encrypt files. Just use a symmetric algorithm (AES, Blowfish, etc.) to encrypt your file, and use RSA only on that symmetric key, if you need symmetric encryption. You cannot encrypt a file using RSA because RSA (well, to be more precise, the implementation of RSA in Java) does not let you encrypt more data than the length of the key. For a 1024 bits key, you can only encrypt 1024 bits that is to say 128 bytes (actually a bit less for padding reasons). In all cases, it is bad practice to encrypt a large piece of data using a public-key algorithm (asymmetric cryptography) for two main reasons.
- The is no practical, appropriate and secure cryptographic mode/padding to encrypt large amounts of data using RSA (ie it is not really secure to do that).
- Public-key algorithms require a large key to be secure (1024 bits, 2048 bits) and are therefore much slower than symmetric-key algorithms (which only require 128 to 256 bits keys to be secure).
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