Discussion - 400-600 words with atleast 2 references

Write 400–600 words that respond to the following questions:  

• Which type of attack on cryptosystems involves using a collection of pre-identified term?
• Which kind of attack involves sequential guessing of all possible key combinations? Explain your answer with examples.
• Provide at least two references to support your initial post.

Please note:

• Be in APA format including your references.
• Be 400–600 words long (not including title and references).
• Do not re-state the questions.
• Include two sources (i.e. two references).