NY Penal Law § 156.20: Computer Tampering in the Fourth Degree
In the New York criminal code, the definition of “unlawful access of computers” is illegally accessing a computer or computer network, or allowing another person to have access. Unauthorized access of a computer can include a number of different activities including figuring out another person’s password and using it to access that person’s computer, giving a password to another person who does not have authorization to access the computer, hacking into someone’s computer via the internet, or pretending to be another person in order to access computer services that would otherwise not be available to you. If you gain access to a computer without the owner’s authorization, and then you alter or destroy data on the computer, then you would have committed the crime of computer tampering. In the New York criminal code, there are 4 different computer tampering crimes. The specific charge that you would be looking at greatly depends on your prior criminal history, the amount of damage you inflict, and your purpose for altering or destroying the computer data. Of the computer tampering crimes, computer tampering in the fourth degree is the least serious one. According to New York Penal Law § 156.20, you will have committed the crime of computer tampering in the fourth degree if
- you use or access a computer, computer service, or computer network without the owner’s authorization and
- with intent to do so, you alter or destroy computer data or the computer program of another person.
For Example
Elizabeth has a 4.0 GPA and is right on course to get accepted by the college of her choice. While she was in the first semester of her junior year in high school, Elizabeth was having a hard time in her honors math class. She was about to get a C in the class, which would drag her average down. Although Elizabeth was committed to continuing to work hard, even planning taking a few summer classes to help bump her GPA back up, her mother had other plans. Without Elizabeth knowing, her mom hacked into the school’s computer system and changed Elizabeth’s honors math grade. In this scenario, Elizabeth’s mom could be prosecuted for computer tampering in the fourth degree because, without the school’s authorization, she accessed one of their computers and she altered the data.
Offenses that are Related
Unauthorized use of a computer: New York Penal Law § 156.05
Computer trespass: New York Penal Law § 156.10
Criminal possession of computer related material: New York Penal Law § 156.35
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(212) 300-5196Computer tampering in the third degree: New York Penal Law § 156.25
Computer tampering in the second degree: New York Penal Law § 156.26
Possible Defenses
Todd Spodek
Lead Attorney & Founder
Featured on Netflix's "Inventing Anna," Todd Spodek brings decades of high-stakes criminal defense experience. His aggressive approach has secured dismissals and acquittals in cases others deemed unwinnable.
A prosecutor would have a hard time pushing forward with a case against you if you can bring evidence that someone other than you used your computer without your knowledge or without your permission to alter or destroy data on another computer.

Your ex-roommate changed the Netflix and shared email passwords after a falling out, but you figured out the new passwords by guessing security questions and logged into both accounts to change them back. Now you've received a call from a detective saying your ex-roommate filed a police report against you for unauthorized computer access.
Can I really be charged with a crime just for logging into accounts that I used to have permission to access?
Under NY Penal Law § 156.20, computer tampering in the fourth degree occurs when a person uses or accesses a computer, computer service, or computer network without authorization and intentionally alters or destroys computer data or a computer program. Even though you previously had legitimate access to those accounts, once your roommate changed the passwords, your authorization was effectively revoked. Circumventing new security credentials to regain access can constitute the 'without authorization' element under New York's computer crime statutes. This is a class A misdemeanor carrying up to one year in jail, so you should consult a defense attorney immediately to explore whether the prior shared access or lack of intent to cause harm could form the basis of a viable defense.
This is general information only. Contact us for advice specific to your situation.
The Sentence
Computer tampering in the fourth degree is categorized as a class A misdemeanor. What this means to you is that if you are convicted, the maximum prison sentence that you could get is 1 year. The judge could also sentence you to a probation term of 3 years as well as a substantial fine.
