DEFINITION
Advanced Encryption Standard (AES)
The Advanced Encryption Standard (AES) is a widely used encryption algorithm that secures sensitive data. It utilises symmetric key cryptography, making it easier to implement than asymmetric key encryption and more efficient than older encryption standards such as the Data Encryption Standard (DES).
Fundamentally, AES mandates that data be “scrambled” to prevent interception. Then, an encryption key is created that handles both the initial “scambling” and the “descrambling” needed to make the data readable once more. In its most secure way, AES can create a 256 bit key, which includes 1.1 septilion different possible combinations. This makes AES very well protected against most brute force attacks.
Synonyms
Rijndael algorithm, symmetric encryption
Acronyms
AES
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Synonyms
Rijndael algorithm, symmetric encryption
Acronyms
AES
Examples
When making online transactions, your session is encrypted using AES. Due to the sensitive nature of banking, the most secure form of AES is used – AES-256. As mentioned, this form of AES will use one of 1.1 septilion different possible encryption keys, making it impossible to guess or brute force.
Therefore, if someone were to intercept the data, which can include your login credentials, transaction details, and personal information, they can’t decipher the data.
FAQ
What makes AES secure?
AES uses fixed block sizes, variable key length, and multiple rounds of transformation to prevent attacks. This means that threat actors can’t brute force their way in.
Why do organizations choose AES over other algorithms?
As it’s easier to implement and use than asymmetric encryption and is more secure than DES, AES offers an optimal balance of security and performance. This makes it widely used and trusted globally.
What is the difference between AES-128, AES-192 and AES-256?
The number refers to the key length in bits. AES-128 uses the shortest key, making it the fastest and AES-256 uses the longest key, making it the most secure. For this reason, AES-128 may be used for every-day low-risk processes such as Wi-Fi connections or messaging while AES-256 is used for more sensitive processes, such as online transactions.
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