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Digital signatures
the digital equivalent of regular ink signatures. They signal your approval or involvement in a digital document and its contents
Digital signatures use Public Key Infrastructure (PKI)
a standard format that provides high security and acceptance to your document
What makes a digital signature so safe
The combination of a public key and a private key
How do digital signatures work
by encrypting a unique digital fingerprint (hash) of the document with the sender’s key
What are significantly more secure than other forms of electric signatures
Digital signatures
Symmetric keys pros and cons
very good for bulk encryption but are difficult to manage and exchange if only symmetric key cryptography is available
When does tracking keys’ expiration and rotation arrangement become inmpractical
With a large estate
What is recommended to maintain the proper life cycle for each created key
Special software
What causes the complexity of key management to grow significantly
every additional user that requires access to the secret key to encrypt or decrypt data
What four ways can the public-key be distributed
Public announcement
Publicly available directory
Public-key authority
Public-key certificates
What does public-key infrastructure encompass
everything used to establish and manage public key encryption
What authenticates the device or user sending the digital communication
PKI uses cryptographic keys that are connected to a digital certificate
What makes up a bitcoin address
a combination of alphanumeric characters which usually begins with the number 1 or 3
What does a bitcoin address represent
the public key of an asymmetric key pair and is a destination for a bitcoin payment
What is a bitcoin wallet
an abstract construct which contains the set of public and private key pairs randomly generated for the user
What is a bitcoin wallet
a wallet is a piece of software used to manage address
Note
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