What is needed to be able to BIO_seek() on a bio_f_cipher() with a cipher of EVP_aes_256_ctr() without the counter, or IV or another internal state getting corrupted? It seems that doing a seek any direction results in corrupted output. -- William King Senior Engineer Quentus Technologies, INC 1037 NE 65th St Suite 273 Seattle, WA 98115 Main: (877) 211-9337 Office: (206) 388-4772 Cell: (253) 686-5518 william.king at quentustech.com