Variable AESCTRConst

Remarks

Initialization Vectors must be 16 octets. During encryption, if IV is unspecified, it is constructed with two parts:

1. 64-bit random number, generated each time a private key instance is constructed.
2. 64-bit counter starting from zero.

During decryption, quality of IV is not automatically checked. Since the security of AES-CTR depends on having unique IVs, the application should check IV uniqueness with CounterIvChecker.