How Are the Three Digits on the Back of Your Credit Card Computed?
The three digits that are printed on the back of a credit or debit card are computed by an algorithm which uses the 2-key Triple DES (Data Encryption Standar...
Posts by Category
Cryptography
Why the 3 Digits on the Back of Your Credit or Debit Card Matter
The three digits on the back of a credit/debit card (CVV2, which I will refer to as CVV), provide some assurance to a merchant and bank/card issuer that a gi...
The Relationship Between Cryptography and Cryptocurrencies
Cryptography and cryptocurrencies are very closely related; cryptography is used in the majority of cryptocurrencies to both control the creation of the curr...
Phishing
Use of Bespoke Branding in O365 Phishing Campaigns
Phishing campaigns will often use bespoke company branding to make their phishing sites more trustworthy. This post discusses how phishing campaigns are able...
Defending against Obfuscation and Link-less Phishing
Phishing kits are commonly used by adversaries to simplify and scale their operations, enabling them to quickly deploy at scale and often reduce the likeliho...
Passwords
Back to Top ↑Breaches
Collection 1 - What should you do?
What is collection #1? Simply put, this is a huge set of data which contains more than 1.1 billion unique email address and password combinations. The datase...
Cybercrime
Is Cybercrime a Global Phenomenon That Is Not Restricted by Geographical Boundaries?
As the usage of computers and the Internet has significantly increased in recent decades, so has the rate of cybercrime. It is argued that cybercrime is a gl...