Thanks Matt. Is there a sample code i can look into? In my case the key is unique across different messages, so having same IV across messages should not lead me into problem
Thanks, Rohit Bansal On Mon, Jan 14, 2013 at 12:22 PM, Matt Caswell <fr...@baggins.org> wrote: > Yes, you can use CTR mode for AES-256: use the EVP interface with the > EVP_CIPHER of EVP_aes_256_ctr(). > > However it is a fundamental requirement of CTR mode that the IV must be > unique across messages. If you reuse the IV then your messages can be > broken quite trivially. Therefore, if by a fixed IV, you mean that it is > fixed across multiple messages then CTR mode is not suitable for you. > > Matt > > > On 14 January 2013 19:25, Rohit Bansal <banr...@gmail.com> wrote: > >> Hi, >> >> Can somebody help me if CTR mode is supported in openssl for AES-256 >> encryption? >> >> I dont want to use CBC and i have a fixed IV. >> >> Thanks, >> Rohit >> > > -- Rohit Bansal
