3.2.0
SwiftECC release 3.2.0 supports encrypted private keys.
A private key can be stored in encrypted PEM format 'ENCRYPTED PRIVATE KEY'
according to the PKCS#5 specification using the PBES2 scheme.
The cipher used is one of AES-128, AES-192 and AES-256 in CBC mode.
The iteration count is 2048 and the salt is 8 random bytes.
SwiftECC can read existing 'ENCRYPTED PRIVATE KEY' PEM files, provided they were encrypted with one
of the ciphers AES-128, AES-192 or AES-256 in CBC mode.