Hi Jean: Thank you so much that really helps a lot.
在 2015年2月14日星期六 UTC上午10:11:30，Jean-Pierre Münch写道： > > Hey Lei, > > If you just want to make sure, a receiver dan decrypt the data, you may > want to try to to decrypt the data before sending / storing / whatever it. > Then you would simply check if the orirginal message equals the > encrypted-decrypted message. > If you want to make sure that you received correct data, there are several > possibilities: > > 1. Integrity checking: Append a Hash to the end of your message > (before encrypting it) and check the hash after decryption. (M' = > E(M||H(M))), Hash-Functions are: SHA-512, SHA-256, SHA-3-512,... > 2. Authentication: Append a MAC-Value to the end of your message (like > in 1), but this time you choose a MAC scheme, providing you the > information > that the sender actually sent and knew the data. You may want to use HMAC, > VMAC, ... > 3. Authenticated mode: You may also use (for AES mainly) and > authenticated encryption mode which can provide you the neccessary > assurances as it has an authentication mechanism included. You may want to > use EAX or something similar > > Usually I prefer to use Method 2 vor symmetric data exchange (-> CTR-AES) > and method 1 for asymmetric data exchange (-> ECIES). > > BR > > JPM > > Am Freitag, 13. Februar 2015 18:18:06 UTC+1 schrieb 雷骜: >> >> Hi everyone: >> >> I'm new in Crypto++ >> >> Recently I'm focusing on AES and ECIES decryption. I wonder if there has >> some way I can know if decryption receives the correct result? >> (In sign and verify, it returns a bool variable so that I know if the >> signature is correct, but in decryption schemes it don't has this kind of >> things) >> >> Thanks a lot, >> >> Best wishes, >> Lei >> > -- -- You received this message because you are subscribed to the "Crypto++ Users" Google Group. To unsubscribe, send an email to [email protected]. More information about Crypto++ and this group is available at http://www.cryptopp.com. --- You received this message because you are subscribed to the Google Groups "Crypto++ Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
