I am security professional with 20 years of experience in the development of security solutions. Extensive expertise in cryptography. Hands on experience with nCipher nShield Hardware Security Module, Thales ProtectServer HSM, Thales Luna Network HSM. Specialties: - Programming Languages: C, JAVA, GO - Cryptographic APIs: MS CryptoAPI, CNG, PKCS#11, JCE/JCA - Cryptographic libraries: OpenSSL, Bouncy Castle - HSM: nCipher nShield , Thales payShield, Thales ProtectServer, Thales Luna, YubiHSM 2 - Trust Execution Environment: CodeSafe (nShield HSM), Function Module (Luna HSM), AWS Nitro Enclave - Crypto currency: Bitcoin, Ethereum, ERC20 token, HD Wallet, Bip-39/32, shamir's secret sharing, multi-signature, MPC - Authentication: Credential Provider, One Time Password (HOTP\​TOTP), Two Factor Authentication, Certificate X509, FIDO2, OAUTH 2.0, JWT - Smart cards: iso 7816, JavaCard - PKIX/PKI: X509, OCSP, TimeStamp, CMS, ASN.1 - Security standards: PKCS family, FIPS series, NIST, OWASP, PCI DSS