Using Klaytn Wallet Key or Private Key A Klaytn Wallet Key is a string of 110 hexadecimal characters associated with an account, whereas a private key is a string of 64 hexadecimal characters (The character count does not include the "0x" prefixes that indicate hexadecimal numbers. If we count them in, a Klaytn Wallet Key is 112 characters long, and a private key is 66 characters long). Using one's private key should always be the last-ditch effort of access, only to be utilized when all else fails. This should not be the main road for anyone to access their accounts. Private keys are the most sensitive information because private keys allow complete access to an account. Therefore, it is extremely important to keep your private key safe, secure, and secret.