OpenSSL ECC key – Additional byte in DER encoding for one curve
In the below, I use OpenSSL to create a private key for the secp224k1 curve. Note the length of the private key in the DER – 0x1d. That’s 29 bytes, or 232 bits, not 224. It appears that a leading zero byte has been prepended…. Continue reading OpenSSL ECC key – Additional byte in DER encoding for one curve