Hello, I recently wondered if multiple encryption can decrease the security of encrypted information. Imho we can basically think of two different scenarios: 1st. Encrypting information twice. For instance: An RSA encrypted mail is stored on a loop-aes encrypted harddrive. (If you think of XOR, you run into serious problems, if using same keys, but I guess RSA and AES won't be a problem at all.) 2nd. Encrypting information more times. For instance: Backups are done on removeable media. Each one is encrypted with a different set of keys for loop-aes, but also containing very similar data. Do you know, serious studies or trust-/helpful reports, etc. on what algorithmens / implementations can / should / mustn't be combined and how multiple encryption effects security? Thanks in advance. Keep smiling yanosz - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/
