Here are some cryptographic opcode functions/features Satos…
Here are some cryptographic opcode functions/features Satoshi included in Bitcoin client 0.1.5: OP_RIPEMD160, OP_SHA1, OP_SHA256, OP_HASH160, OP_HASH256, OP_CODESEPARATOR, OP_CHECKSIG, OP_CHECKSIGVERIFY, OP_CHECKMULTISIG, OP_CHECKMULTISIGVERIFY.