Security Basics mailing list archives
splited file encrypted with blowfish secure?
From: Andre Pawlowski <sqall () h4des org>
Date: Tue, 04 Nov 2008 18:32:49 +0100
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, I have a question about the security of my encryption. I have written a program in php which splits a file in small parts, encrypts each of them with blowfish and put it together. It uses the same key for every encryption of the parts. The reason I do it like this is that php is only allowed to use 16MB of memory space and so it cannot encrypt or decrypt large files. Here is my question. Is it less secure when I encrypt a file not as one big file? I mean, is it easier for someone to get the key or plain data of a file if he has 100 parts encrypted with the same key in comparison with only having one big file? Thanks a lot - -- Andre Pawlowski - ------------------------------------------------------------------- If you could be God's worst enemy or nothing, which would you choose? -Chuck Palahniuk -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iQEcBAEBAgAGBQJJEIc/AAoJEA2U0jC2zA/Pt0wH/0WuVxZmJc7GC53ypaPxNQ6b w/iANGiW9eD7Y+SvornWl08ojg5bb/5+67O0MsVELt8xDB+YeVrok3KjD9DosrOC 7gCFZx0ncYYy85mkYSNe5aQwdZsKAB1qVEfGC9eHMyI6WyGzahmmXxOQCzW5QDoD THht3z4nF9a8sCcoMEHA0GuQ85KdHYxp1rN7Uxc/xlzU+0XvZp4DRg3xYjrKZv3U +jpVsDKntB/T012z6hr9ip2O8ywKvzGtIhOj30QradzoOBvrH3dBttSjnKBJ+lLA //f0ev7vV2P5t0eEW06n4XtROE4FNpV0S+kYR0gy6+po/4xQVjnEvRXQIywS9pI= =9o3q -----END PGP SIGNATURE-----
Current thread:
- splited file encrypted with blowfish secure? Andre Pawlowski (Nov 04)
- Re: splited file encrypted with blowfish secure? Ansgar Wiechers (Nov 04)
- Re: splited file encrypted with blowfish secure? Shreyas Zare (Nov 05)
- Re: splited file encrypted with blowfish secure? Roscoe (Nov 10)
- <Possible follow-ups>
- Re: splited file encrypted with blowfish secure? Andre Pawlowski (Nov 12)
- Re: splited file encrypted with blowfish secure? Sam Stelfox (Nov 24)
- Re: splited file encrypted with blowfish secure? Ansgar Wiechers (Nov 04)