What is a nonce?

A nonce is a random number which should only be used once in cryptographic operations.

What is a public key?

A public key is used in asymmetric cryptosystems and is needed to verify digital signatures or to encrypt data. There always exists a cryptographically linked private key to a public key.

What is a hash?

A hash is a numerical value with a fixed length which can be deterministically created from an input of arbitrary length. A hash is usually created from a hash function. Cryptographically secure hash functions are needed for digital signatures, blockchains and many more applications.

Where is my private key?

In sproof, you can choose where you want to store your private key. There are two options: On the sproof server: We securely store your private key for you. For that, we encrypt your private key with a passphrase of your choice. On your own computer: You can download your private key from our web […]

What is a digital signature?

A digital signature is a cryptographical scheme to verify the authenticity and integrity of digital data or documents and also to check the identity of the signer. In sproof the signer is represented by a profile. With a sproof profile you can register and digitally sign documents and data.

What is a private key?

A private key is needed to create digital signatures, encrypt or decrypt data. There always exist a cryptographically linked public key to a private key. For blockchain applications, e.g., sproof, the private key is your secret to add or update your data. If you lose your private key, you do not have access anymore. The […]

What is a passphrase?

A passphrase is a password which protects your private key. You can only change your passphrase if you know the old one. If you forgot your passphrase we can not reset it for you. This is to protect your private key from unauthorized access.