Heavy duty bag used to contain high-value products, documents or legally-sensitive items
Tamper evident bag tape providing additional layer of securityEvidence bagCurrency bag
Asecurity bag is a heavy duty bag used to contain high-value products, documents or legally sensitive items. Envelopes with security features are calledsecurity envelopes as well as security bags. Cash for deposit in a bank is often placed in a specialdeposit bag with security features.[1][2] When they are used to contain items related to a crime, specialevidence bags are used.[3]Authentication of signatures andchain of custody are often required.
Security bags orenvelopes may be specially designedplastic bags,paper bags, or fabric bags. Bags or envelopes can be made to betamper resistant to make it difficult for unauthorized entry. It is often more important for these to betamper evident so that an unauthorized entry is easily detected to have occurred.
Bags and envelopes are often closed by an integralpressure sensitive adhesive on the closing flap. The removal of arelease liner allows convenient closing of the bag. Several types of security features can be included in the flap structure and are designed to indicate its opening irreversibly.[4][5][6][7][8][9][10]
Separatesecurity tapes are also used. Tamper-indicating security seals employ a variety of mechanisms for operation, each with its own advantages and disadvantages.
Documentation such as labels for certified signatures for custody and chain-of-custody labels are frequently included.
No one security feature can be considered as "tamper proof".[11] Layers of tamper-resistant and tamper-evident features, as well as the broader security systems are needed to provide better assurance of security. All security products can be foiled by a knowledgeable person with sufficient time and with access to specialized tools, solvents, extreme temperatures,[12] other security bags,security tapes, etc.
When electronic devices, cell phones, media storage, etc. are collected as evidence in a criminal investigation, faraday bags can be used to prevent damage or adulteration. As aFaraday cage, these haveelectromagnetic shielding to prevent electronic access to contents.[13][14]
Smaller personal faraday bags are used to prevent unwanted access to credit cards, keyfobs, cell phones, etc.[15][16]
